Configure the pipeline library to support loading submodules, this is required since we use libraries inside of global-jjb.

```

Error when executing always post condition:
hudson.AbortException: No such library resource shell/create-netrc.sh could be found.
	at org.jenkinsci.plugins.workflow.libs.ResourceStep$Execution.run(ResourceStep.java:96)
	at org.jenkinsci.plugins.workflow.libs.ResourceStep$Execution.run(ResourceStep.java:86)
	at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousStepExecution.start(AbstractSynchronousStepExecution.java:41)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:322)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:196)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:124)
	at jdk.internal.reflect.GeneratedMethodAccessor712.invoke(Unknown Source)

```