http repository workaround not working

### Problem Description

I am working with a maven repository that is running on http. It is internal and cannot be accessed from the outside so there's little possibility of MITM. Using the provided snippet to configure http

```clojure
(require 'cemerick.pomegranate.aether)
(cemerick.pomegranate.aether/register-wagon-factory!
"http" #(org.apache.maven.wagon.providers.http.HttpWagon.))
```

doesn't work:

```
Deploying cica-0.1.0.jar...
clojure.lang.ExceptionInfo: Failed to deploy artifacts/metadata: Cannot access http://mr01.hq.gratex.com/nexus/content/repositories/releases with type default using the available connector factories: BasicRepositoryConnectorFactory {:line 65}
at clojure.core$ex_info.invokeStatic(core.clj:4739)
at clojure.core$ex_info.invoke(core.clj:4739)
at boot.main$_main$fn__1868.invoke(main.clj:222)
at boot.main$_main.invoke(main.clj:216)
at clojure.lang.Var.invoke(Var.java:396)
at org.projectodd.shimdandy.impl.ClojureRuntimeShimImpl.invoke(ClojureRuntimeShimImpl.java:159)
at org.projectodd.shimdandy.impl.ClojureRuntimeShimImpl.invoke(ClojureRuntimeShimImpl.java:150)
at boot.App.runBoot(App.java:407)
at boot.App.main(App.java:500)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at Boot.main(Boot.java:257)
Caused by: org.eclipse.aether.deployment.DeploymentException: Failed to deploy artifacts/metadata: Cannot access http://mr01.hq.gratex.com/nexus/content/repositories/releases with type default using the available connector factories: BasicRepositoryConnectorFactory
at org.eclipse.aether.internal.impl.DefaultDeployer.deploy(DefaultDeployer.java:278)
at org.eclipse.aether.internal.impl.DefaultDeployer.deploy(DefaultDeployer.java:254)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.deploy(DefaultRepositorySystem.java:422)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93)
at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:28)
at cemerick.pomegranate.aether$deploy_artifacts.doInvoke(aether.clj:361)
at clojure.lang.RestFn.applyTo(RestFn.java:137)
at clojure.core$apply.invokeStatic(core.clj:657)
at clojure.core$apply.invoke(core.clj:652)
at cemerick.pomegranate.aether$deploy.doInvoke(aether.clj:434)
at clojure.lang.RestFn.invoke(RestFn.java:1096)
at boot.aether$deploy.invoke(aether.clj:358)
at clojure.lang.AFn.applyToHelper(AFn.java:171)
at clojure.lang.AFn.applyTo(AFn.java:144)
at clojure.lang.Var.applyTo(Var.java:702)
at clojure.core$apply.invokeStatic(core.clj:657)
at clojure.core$apply.invoke(core.clj:652)
at boot.pod$eval_fn_call.invoke(pod.clj:359)
at boot.pod$call_in_STAR_.invoke(pod.clj:410)
at clojure.lang.Var.invoke(Var.java:381)
at org.projectodd.shimdandy.impl.ClojureRuntimeShimImpl.invoke(ClojureRuntimeShimImpl.java:109)
at org.projectodd.shimdandy.impl.ClojureRuntimeShimImpl.invoke(ClojureRuntimeShimImpl.java:102)
at sun.reflect.GeneratedMethodAccessor52.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93)
at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:28)
at boot.pod$call_in_STAR_.invoke(pod.clj:413)
at boot.task.built_in$fn__3118$fn__3119$fn__3124$fn__3125.invoke(built_in.clj:1079)
at boot.task.built_in$fn__3070$fn__3071$fn__3076$fn__3077.invoke(built_in.clj:978)
at boot.task.built_in$fn__2940$fn__2941$fn__2946$fn__2947.invoke(built_in.clj:875)
at boot.task.built_in$fn__2585$fn__2586$fn__2595$fn__2596.invoke(built_in.clj:576)
at boot.core$run_tasks.invoke(core.clj:1022)
at boot.core$boot$fn__937.invoke(core.clj:1032)
at clojure.core$binding_conveyor_fn$fn__5476.invoke(core.clj:2022)
at clojure.lang.AFn.call(AFn.java:18)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.eclipse.aether.transfer.NoRepositoryConnectorException: Cannot access http://mr01.hq.gratex.com/nexus/content/repositories/releases with type default using the available connector factories: BasicRepositoryConnectorFactory
at org.eclipse.aether.internal.impl.DefaultRepositoryConnectorProvider.newRepositoryConnector(DefaultRepositoryConnectorProvider.java:183)
at org.eclipse.aether.internal.impl.DefaultDeployer.deploy(DefaultDeployer.java:274)
... 43 more
Caused by: org.eclipse.aether.transfer.NoRepositoryConnectorException: Cannot access http://mr01.hq.gratex.com/nexus/content/repositories/releases using the registered transporter factories: FileTransporterFactory, WagonTransporterFactory
at org.eclipse.aether.connector.basic.BasicRepositoryConnector.(BasicRepositoryConnector.java:128)
at org.eclipse.aether.connector.basic.BasicRepositoryConnectorFactory.newInstance(BasicRepositoryConnectorFactory.java:189)
at org.eclipse.aether.internal.impl.DefaultRepositoryConnectorProvider.newRepositoryConnector(DefaultRepositoryConnectorProvider.java:122)
... 44 more
Caused by: org.eclipse.aether.transfer.NoTransporterException: Cannot access http://mr01.hq.gratex.com/nexus/content/repositories/releases using the registered transporter factories: FileTransporterFactory, WagonTransporterFactory
at org.eclipse.aether.internal.impl.DefaultTransporterProvider.newTransporter(DefaultTransporterProvider.java:160)
at org.eclipse.aether.connector.basic.BasicRepositoryConnector.(BasicRepositoryConnector.java:124)
... 46 more
```

### Steps to reproduce

- add the `register-wagon-factory!` snippet
- try to `boot push` to it

### Platform details

Platform Linux
Platform version ubuntu 18.04.1
JRE/JDK version openjdk 1.8.0_181

### Boot details

Boot version 2.8.2
`build.boot` present? yes
`~/.boot/profile` present? yes
Task name? push

`profile.boot` and `build.boot` don't contain anything special except the snippet provided above. The same snippet works reliably with `lein`ingen