Fixed NullPointerException on SmartStackTraceParser init occurring when ...

Failsafe report crushes when Thread.contextCassLoader is null:

ERROR] org.apache.maven.surefire.testset.TestSetFailedException: java.lang.NullPointerException
[ERROR] at org.apache.maven.surefire.common.junit4.JUnit4RunListener.rethrowAnyTestMechanismFailures(JUnit4RunListener.java:206)
[ERROR] at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:129)
[ERROR] at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
[ERROR] at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
[ERROR] at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)
[ERROR] Caused by: java.lang.NullPointerException
[ERROR] at org.apache.maven.surefire.report.SmartStackTraceParser.getClass(SmartStackTraceParser.java:67)
[ERROR] at org.apache.maven.surefire.report.SmartStackTraceParser.<init>(SmartStackTraceParser.java:57)
[ERROR] at org.apache.maven.surefire.common.junit4.JUnit4StackTraceWriter.smartTrimmedStackTrace(JUnit4StackTraceWriter.java:77)