NPE trying to execute system groovy script after upgrade to 1.1.3

docker-plugin version: 1.1.3 (was not present on 1.1.1; downgrading resolves it again)
jenkins version: 2.89.4
groovy plugin version: 2.0
docker engin version: 1.9.0

`Execute system groovy script` step (which runs on master) will fail with the following stacktrace:
```
java.lang.NullPointerException: Cannot invoke method replaceFirst() on null object
at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:91)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:48)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:35)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:157)
at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:159)
at org.kohsuke.groovy.sandbox.impl.Checker$checkedCall$1.callStatic(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallStatic(CallSiteArray.java:56)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callStatic(AbstractCallSite.java:194)
at Script1.run(Script1.groovy:7)
at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.run(GroovySandbox.java:141)
at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SecureGroovyScript.evaluate(SecureGroovyScript.java:333)
at hudson.plugins.groovy.SystemGroovy.run(SystemGroovy.java:95)
at hudson.plugins.groovy.SystemGroovy.perform(SystemGroovy.java:59)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:744)
at hudson.model.Build$BuildExecution.build(Build.java:206)
at hudson.model.Build$BuildExecution.doRun(Build.java:163)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
at hudson.model.Run.execute(Run.java:1724)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:97)
at hudson.model.Executor.run(Executor.java:429)
```

Other potentially useful details:
The following errors occur in Manage Old Data (with a type of `hudson.model.FreeStyleBuild`):
```
MissingFieldException: No field 'cloudId' found in class 'com.nirima.jenkins.plugins.docker.action.DockerBuildAction',
MissingFieldException: No field 'inspect' found in class 'com.nirima.jenkins.plugins.docker.action.DockerBuildAction'
```