Flaky rpm tests

[muuki88]

The override-start-script-systemd (see job on master) throws NullPointerExceptions.

We had two changes in #1212 and #1211 to the RPM output logging. Maybe we require an additional null check somehwere.

[info] java.lang.NullPointerException
[info] 	at sbt.ConsoleLogger.log(ConsoleLogger.scala:195)
[info] 	at sbt.ConsoleLogger.log(ConsoleLogger.scala:185)
[info] 	at sbt.AbstractLogger.log(Logger.scala:28)
[info] 	at sbt.MultiLogger$$anonfun$dispatch$1.apply(MultiLogger.scala:35)
[info] 	at sbt.MultiLogger$$anonfun$dispatch$1.apply(MultiLogger.scala:33)
[info] 	at scala.collection.immutable.List.foreach(List.scala:318)
[info] 	at sbt.MultiLogger.dispatch(MultiLogger.scala:33)
[info] 	at sbt.MultiLogger.log(MultiLogger.scala:27)
[info] 	at sbt.Logger$class.info(Logger.scala:117)
[info] 	at sbt.AbstractLogger.info(Logger.scala:11)
[info] 	at com.typesafe.sbt.packager.rpm.RpmHelper$$anonfun$buildPackage$1$$anonfun$apply$10.apply(RpmHelper.scala:114)
[info] 	at com.typesafe.sbt.packager.rpm.RpmHelper$$anonfun$buildPackage$1$$anonfun$apply$10.apply(RpmHelper.scala:114)
[info] 	at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
[info] 	at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
[info] 	at com.typesafe.sbt.packager.rpm.RpmHelper$$anonfun$buildPackage$1.apply(RpmHelper.scala:114)
[info] 	at com.typesafe.sbt.packager.rpm.RpmHelper$$anonfun$buildPackage$1.apply(RpmHelper.scala:88)
[info] 	at sbt.IO$.withTemporaryDirectory(IO.scala:358)
[info] 	at com.typesafe.sbt.packager.rpm.RpmHelper$.buildPackage(RpmHelper.scala:88)
[info] 	at com.typesafe.sbt.packager.rpm.RpmHelper$.buildRpm(RpmHelper.scala:38)
[info] 	at com.typesafe.sbt.packager.rpm.RpmPlugin$$anonfun$projectSettings$49.apply(RpmPlugin.scala:168)
[info] 	at com.typesafe.sbt.packager.rpm.RpmPlugin$$anonfun$projectSettings$49.apply(RpmPlugin.scala:168)
[info] 	at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
[info] 	at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
[info] 	at sbt.std.Transform$$anon$4.work(System.scala:63)
[info] 	at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
[info] 	at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
[info] 	at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
[info] 	at sbt.Execute.work(Execute.scala:237)
[info] 	at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
[info] 	at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
[info] 	at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
[info] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
[info] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[info] 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[info] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[info] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[info] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[info] 	at java.lang.Thread.run(Thread.java:748)
[info] [error] (rpm:packageBin) java.lang.NullPointerException
[info] [error] Total time: 1 s, completed Jul 11, 2019 7:07:40 AM
[error] x rpm / override-start-script-systemd
[error]    {line 2}  Command failed: rpm:packageBin failed
Running rpm / scriptlets-override-rpm
Running rpm / scriplets-no-javarepack-rpm
Running rpm / test-packageName
Running rpm / scriptlets-override-build-rpm
Running rpm / scriplets-use-javarepack-rpm
Running rpm / systemd-rpm
Running rpm / override-loader-functions
Running rpm / symlink-rpm
Running rpm / setarch-rpm
Running rpm / override-start-script-systemv
Running rpm / snapshot-rpm
[error] java.lang.RuntimeException: Failed tests:
[error] 	rpm / override-start-script-systemd
[error] 
[error] 	at scala.sys.package$.error(package.scala:27)
[error] 	at sbt.test.ScriptedRunner.runAll(ScriptedTests.scala:156)
[error] 	at sbt.test.ScriptedRunner.run(ScriptedTests.scala:151)
[error] 	at sbt.test.ScriptedRunner.run(ScriptedTests.scala:131)
[error] 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[error] 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[error] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[error] 	at java.lang.reflect.Method.invoke(Method.java:498)
[error] 	at sbt.ScriptedPlugin$.$anonfun$scriptedTask$3(ScriptedPlugin.scala:185)
[error] 	at sbt.ScriptedPlugin$.$anonfun$scriptedTask$3$adapted(ScriptedPlugin.scala:170)
[error] 	at scala.Function1.$anonfun$compose$1(Function1.scala:44)
[error] 	at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:40)
[error] 	at sbt.std.Transform$$anon$4.work(System.scala:67)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:269)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:16)
[error] 	at sbt.Execute.work(Execute.scala:278)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:269)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:178)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:37)
[error] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error] 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[error] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[error] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[error] 	at java.lang.Thread.run(Thread.java:748)
[error] (scripted) Failed tests:
[error] 	rpm / override-start-script-systemd
[error] Total time: 474 s, completed Jul 11, 2019 7:11:11 AM