fixing null pointer exception when no report path provided

Several of my builds were breaking when I updated to the latest version yesterday. There was a null pointer exception being thrown when no report path was provided. I added a test to reproduce the bug and then added the fix in parseReportsProperty(), I did notice that there is no default value for the TypeScriptPlugin.SETTING_LCOV_REPORT_PATH property in TypeScriptPlugin.java. It could have been easily fixed by setting the default value to an empty string but I wasn't sure if you left it that way on purpose so I just fixed it in TsCoverageSensorImpl instead. Here is the error I was receving:


##[error]java.lang.NullPointerException
##[error]at com.pablissimo.sonar.TsCoverageSensorImpl.parseReportsProperty(TsCoverageSensorImpl.java:42)
##[error]at com.pablissimo.sonar.TsCoverageSensorImpl.execute(TsCoverageSensorImpl.java:152)
##[error]at com.pablissimo.sonar.CombinedCoverageSensor.execute(CombinedCoverageSensor.java:33)
##[error]at org.sonar.scanner.sensor.SensorWrapper.analyse(SensorWrapper.java:53)
##[error]at org.sonar.scanner.phases.SensorsExecutor.executeSensor(SensorsExecutor.java:57)
##[error]at org.sonar.scanner.phases.SensorsExecutor.execute(SensorsExecutor.java:49)
##[error]at org.sonar.scanner.phases.AbstractPhaseExecutor.execute(AbstractPhaseExecutor.java:78)
##[error]at org.sonar.scanner.scan.ModuleScanContainer.doAfterStart(ModuleScanContainer.java:182)
##[error]at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:142)
##[error]at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:127)
##[error]at org.sonar.scanner.scan.ProjectScanContainer.scan(ProjectScanContainer.java:247)
##[error]at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:242)
##[error]at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:240)
##[error]at org.sonar.scanner.scan.ProjectScanContainer.doAfterStart(ProjectScanContainer.java:232)
##[error]at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:142)
##[error]at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:127)
##[error]at org.sonar.scanner.task.ScanTask.execute(ScanTask.java:47)
##[error]at org.sonar.scanner.task.TaskContainer.doAfterStart(TaskContainer.java:86)
##[error]at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:142)
##[error]at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:127)
##[error]at org.sonar.scanner.bootstrap.GlobalContainer.executeTask(GlobalContainer.java:115)
##[error]at org.sonar.batch.bootstrapper.Batch.executeTask(Batch.java:116)
##[error]at org.sonarsource.scanner.api.internal.batch.BatchIsolatedLauncher.execute(BatchIsolatedLauncher.java:62)
##[error]at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
##[error]at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
##[error]at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
##[error]at java.lang.reflect.Method.invoke(Unknown Source)
##[error]at org.sonarsource.scanner.api.internal.IsolatedLauncherProxy.invoke(IsolatedLauncherProxy.java:60)
##[error]at com.sun.proxy.$Proxy0.execute(Unknown Source)
##[error]at org.sonarsource.scanner.api.EmbeddedScanner.doExecute(EmbeddedScanner.java:233)
##[error]at org.sonarsource.scanner.api.EmbeddedScanner.runAnalysis(EmbeddedScanner.java:151)
##[error]at org.sonarsource.scanner.cli.Main.runAnalysis(Main.java:110)
##[error]at org.sonarsource.scanner.cli.Main.execute(Main.java:74)
##[error]at org.sonarsource.scanner.cli.Main.main(Main.java:61)
##[error]ERROR:
##[error]ERROR: Re-run SonarQube Scanner using the -X switch to enable full debug logging.
##[error]The SonarQube Scanner did not complete successfully```

Pablissimo / SonarTsPlugin

fixing null pointer exception when no report path provided #171