NPE in LifecycleModule$LifecycleProvisionListener.onStopped

[pmezrin1]

When LifecycleInjectorCreator.createInjector is failed, there is attempt to close
preDestroyMonitor. But it may not be initialized yet, it is causing NPE to be logged.

Suggestion is to check preDestroyMonitor for null before calling close() on it or log warn instead of error with stacktrace.

java.lang.NullPointerException: null
	at com.netflix.governator.LifecycleModule$LifecycleProvisionListener.onStopped(LifecycleModule.java:136) ~[governator-core-1.17.7.jar]
	at com.netflix.governator.SafeLifecycleListener.onStopped(SafeLifecycleListener.java:58) ~[governator-core-1.17.7.jar]
	at com.netflix.governator.LifecycleManager.notifyStartFailed(LifecycleManager.java:118) ~[governator-core-1.17.7.jar]
	at com.netflix.governator.LifecycleInjectorCreator.createInjector(LifecycleInjectorCreator.java:131) ~[governator-core-1.17.7.jar]
	at com.netflix.governator.LifecycleInjectorCreator.createInjector(LifecycleInjectorCreator.java:38) ~[governator-core-1.17.7.jar]
	at com.netflix.governator.InjectorBuilder.createInjector(InjectorBuilder.java:209) ~[governator-core-1.17.7.jar]
	at com.netflix.governator.InjectorBuilder.createInjector(InjectorBuilder.java:223) ~[governator-core-1.17.7.jar]