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java.lang.NullPointerException: null	at org.commonjava.maven.ext.manip.impl.DependencyRemovalManipulator.apply(DependencyRemovalManipulator.java:109)	at org.commonjava.maven.ext.manip.impl.DependencyRemovalManipulator.applyChanges(DependencyRemovalManipulator.java:91)	at org.commonjava.maven.ext.manip.ManipulationManager.applyManipulations(ManipulationManager.java:227)	at org.commonjava.maven.ext.manip.ManipulationManager.scanAndApply(ManipulationManager.java:148)	at org.commonjava.maven.ext.manip.ManipulatingEventSpy.onEvent(ManipulatingEventSpy.java:132)	at org.apache.maven.eventspy.internal.EventSpyDispatcher.onEvent(EventSpyDispatcher.java:108)	at org.apache.maven.eventspy.internal.EventSpyExecutionListener.projectDiscoveryStarted(EventSpyExecutionListener.java:47)	at org.apache.maven.lifecycle.internal.DefaultExecutionEventCatapult.fire(DefaultExecutionEventCatapult.java:57)	at org.apache.maven.lifecycle.internal.DefaultExecutionEventCatapult.fire(DefaultExecutionEventCatapult.java:42)	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:238)	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:154)	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:582)	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)	at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)	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:497)	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)