This plugin seems to break the GitLab integration plugin

### Jenkins and plugins versions report

Jenkins: 2.426.3
OS: Linux - 4.15.0-208-generic
Java: 11.0.19 - Ubuntu (OpenJDK 64-Bit Server VM)
---
ant:497.v94e7d9fffa_b_9
antisamy-markup-formatter:162.v0e6ec0fcfcf6
apache-httpcomponents-client-4-api:4.5.14-208.v438351942757
bootstrap5-api:5.3.2-3
bouncycastle-api:2.30.1.77-225.v26ea_c9455fd9
branch-api:2.1144.v1425d1c3d5a_7
build-timeout:1.32
caffeine-api:3.1.8-133.v17b_1ff2e0599
checks-api:2.0.2
cloudbees-folder:6.858.v898218f3609d
commons-lang3-api:3.13.0-62.v7d18e55f51e2
commons-text-api:1.11.0-95.v22a_d30ee5d36
coverage:1.10.0
credentials:1311.vcf0a_900b_37c2
credentials-binding:657.v2b_19db_7d6e6d
dashboard-view:2.495.v07e81500c3f2
data-tables-api:1.13.8-2
display-url-api:2.200.vb_9327d658781
durable-task:543.v262f6a_803410
echarts-api:5.4.3-2
email-ext:2.104
embeddable-build-status:467.v4a_954796e45d
font-awesome-api:6.5.1-2
forensics-api:2.3.0
git:5.2.1
git-client:4.6.0
github:1.37.3.1
github-api:1.318-461.v7a_c09c9fa_d63
github-branch-source:1772.va_69eda_d018d4
gitlab-api:5.3.0-91.v1f9a_fda_d654f
gitlab-oauth:1.19
gitlab-plugin:1.8.0
gradle:2.9
gson-api:2.10.1-15.v0d99f670e0a_7
instance-identity:185.v303dc7c645f9
ionicons-api:56.v1b_1c8c49374e
jackson2-api:2.16.1-373.ve709c6871598
jakarta-activation-api:2.0.1-3
jakarta-mail-api:2.0.1-3
javax-activation-api:1.2.0-6
javax-mail-api:1.6.2-9
jaxb:2.3.9-1
jersey2-api:2.41-133.va_03323b_a_1396
jjwt-api:0.11.5-77.v646c772fddb_0
joda-time-api:2.12.6-21.vca_fd74418fb_7
jquery3-api:3.7.1-1
json-path-api:2.9.0-33.v2527142f2e1d
junit:1256.v002534a_5f33e
ldap:711.vb_d1a_491714dc
mailer:463.vedf8358e006b_
matrix-auth:3.2.1
matrix-project:822.824.v14451b_c0fd42
mina-sshd-api-common:2.12.0-90.v9f7fb_9fa_3d3b_
mina-sshd-api-core:2.12.0-90.v9f7fb_9fa_3d3b_
okhttp-api:4.11.0-157.v6852a_a_fa_ec11
pam-auth:1.10
pipeline-build-step:540.vb_e8849e1a_b_d8
pipeline-github-lib:42.v0739460cda_c4
pipeline-graph-analysis:202.va_d268e64deb_3
pipeline-groovy-lib:704.vc58b_8890a_384
pipeline-input-step:477.v339683a_8d55e
pipeline-milestone-step:111.v449306f708b_7
pipeline-model-api:2.2175.v76a_fff0a_2618
pipeline-model-definition:2.2175.v76a_fff0a_2618
pipeline-model-extensions:2.2175.v76a_fff0a_2618
pipeline-rest-api:2.34
pipeline-stage-step:305.ve96d0205c1c6
pipeline-stage-tags-metadata:2.2175.v76a_fff0a_2618
pipeline-stage-view:2.34
plain-credentials:143.v1b_df8b_d3b_e48
plugin-util-api:3.8.0
prism-api:1.29.0-10
resource-disposer:0.23
scm-api:683.vb_16722fb_b_80b_
script-security:1313.v7a_6067dc7087
snakeyaml-api:2.2-111.vc6598e30cc65
ssh-credentials:308.ve4497b_ccd8f4
ssh-slaves:2.948.vb_8050d697fec
sshd:3.322.v159e91f6a_550
structs:337.v1b_04ea_4df7c8
timestamper:1.26
token-macro:400.v35420b_922dcb_
trilead-api:2.133.vfb_8a_7b_9c5dd1
variant:60.v7290fc0eb_b_cd
workflow-aggregator:596.v8c21c963d92d
workflow-api:1283.v99c10937efcb_
workflow-basic-steps:1042.ve7b_140c4a_e0c
workflow-cps:3853.vb_a_490d892963
workflow-durable-task-step:1317.v5337e0c1fe28
workflow-job:1385.vb_58b_86ea_fff1
workflow-multibranch:773.vc4fe1378f1d5
workflow-scm-step:415.v434365564324
workflow-step-api:657.v03b_e8115821b_
workflow-support:865.v43e78cc44e0d
ws-cleanup:0.45

### What Operating System are you using (both controller, and any agents involved in the problem)?

Distributor ID: Ubuntu
Description: Ubuntu 18.04.6 LTS
Release: 18.04
Codename: bionic

### Reproduction steps

- Setup a pipeline in Jenkins
- Install gitlab-plugin
- Setup the Jenkins integration in GitLab (with the ‘/project’ end-point)
- Test the configuration (works)
- Install the gitlab-oauth-plugin
- Enable oauth plugin in Security Realm
- Test the configuration in GitLab again (or push/merge request)
-> fails with error 500

Error log from jenkins:
```
org.gitlab4j.api.GitLabApiException: 401 Unauthorized
at org.gitlab4j.api.AbstractApi.validate(AbstractApi.java:678)
at org.gitlab4j.api.AbstractApi.get(AbstractApi.java:214)
at org.gitlab4j.api.UserApi.getCurrentUser(UserApi.java:673)
at org.jenkinsci.plugins.GitLabAuthenticationToken.(GitLabAuthenticationToken.java:101)
at org.jenkinsci.plugins.GitLabSecurityRealm$1.authenticate(GitLabSecurityRealm.java:479)
Caused: java.lang.RuntimeException
at org.jenkinsci.plugins.GitLabSecurityRealm$1.authenticate(GitLabSecurityRealm.java:483)
at org.acegisecurity.AuthenticationManager.lambda$toSpring$1(AuthenticationManager.java:48)
at jenkins.security.BasicHeaderRealPasswordAuthenticator.authenticate2(BasicHeaderRealPasswordAuthenticator.java:60)
at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:83)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:117)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:63)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:111)
at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:172)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:53)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:86)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at jenkins.security.SuspiciousRequestFilter.doFilter(SuspiciousRequestFilter.java:38)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:527)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:569)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1570)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1384)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1543)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1306)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
at org.eclipse.jetty.server.Server.handle(Server.java:563)
at org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:199)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149)
at java.base/java.lang.Thread.run(Thread.java:829)
```

### Expected Results

The `/project` endpoint should still work and GitLab should still be able to trigger the pipeline.

### Actual Results

The request to Jenkins fails with error 500 as soon as the oauth plugin is used (Security Realm).
The authentication with oauth works as expected.

### Anything else?

The provided log shows an error of the gitlab-api-plugin.
Should this instead be reported there?

### Are you interested in contributing a fix?

_No response_