Example builds:

- http://jenkins.ovirt.org/job/vdsm_standard-check-patch/12526/

- http://jenkins.ovirt.org/job/vdsm_standard-check-patch/12527/

java.lang.LinkageError: loader (instance of  org/jenkinsci/plugins/workflow/cps/CpsGroovyShell$CleanGroovyClassLoader): attempted  duplicate class definition for name: "Project"
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at groovy.lang.GroovyClassLoader.access$400(GroovyClassLoader.java:62)
	at groovy.lang.GroovyClassLoader$ClassCollector.createClass(GroovyClassLoader.java:500)
	at groovy.lang.GroovyClassLoader$ClassCollector.onClassNode(GroovyClassLoader.java:517)
	at groovy.lang.GroovyClassLoader$ClassCollector.call(GroovyClassLoader.java:521)
	at org.codehaus.groovy.control.CompilationUnit$17.call(CompilationUnit.java:834)
	at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1065)
	at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:603)
	at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:581)
	at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:558)
	at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:298)
	at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:268)
	at groovy.lang.GroovyShell.parseClass(GroovyShell.java:688)
	at groovy.lang.GroovyShell.parse(GroovyShell.java:700)
	at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.doParse(CpsGroovyShell.java:142)
	at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.parse(CpsGroovyShell.java:113)
	at groovy.lang.GroovyShell.parse(GroovyShell.java:736)
	at groovy.lang.GroovyShell.parse(GroovyShell.java:727)
	at org.jenkinsci.plugins.workflow.cps.steps.LoadStepExecution.start(LoadStepExecution.java:49)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:269)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:177)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:122)
	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.AbstractCallSite.call(AbstractCallSite.java:113)
	at com.cloudbees.groovy.cps.sandbox.DefaultInvoker.methodCall(DefaultInvoker.java:20)
	at WorkflowScript.load_code(WorkflowScript:45)
	at Script4.on_load(Script4.groovy:22)
	at WorkflowScript.load_code(WorkflowScript:47)
	at Script1.on_load(Script1.groovy:13)
	at WorkflowScript.load_code(WorkflowScript:47)
	at WorkflowScript.run(WorkflowScript:22)
	at ___cps.transform___(Native Method)
	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:84)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:113)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:83)
	at sun.reflect.GeneratedMethodAccessor681.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
	at com.cloudbees.groovy.cps.impl.LocalVariableBlock$LocalVariable.get(LocalVariableBlock.java:39)
	at com.cloudbees.groovy.cps.LValueBlock$GetAdapter.receive(LValueBlock.java:30)
	at com.cloudbees.groovy.cps.impl.LocalVariableBlock.evalLValue(LocalVariableBlock.java:28)
	at com.cloudbees.groovy.cps.LValueBlock$BlockImpl.eval(LValueBlock.java:55)
	at com.cloudbees.groovy.cps.LValueBlock.eval(LValueBlock.java:16)
	at com.cloudbees.groovy.cps.Next.step(Next.java:83)
	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:174)
	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:163)
	at org.codehaus.groovy.runtime.GroovyCategorySupport$ThreadCategoryInfo.use(GroovyCategorySupport.java:129)
	at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategorySupport.java:268)
	at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:163)
	at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:186)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:370)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$200(CpsThreadGroup.java:93)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:282)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:270)
	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:66)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	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)
Finished: FAILURE