added asynchronous test exercise + @Rule ExpectedException
Merge branch 'master' of github.com:arvatoSystemsNA/itec-ide-exercise

# By Patrick Ruhkopf
# Via Patrick Ruhkopf
* 'master' of github.com:arvatoSystemsNA/itec-ide-exercise:
  Adding flexi search examples
  Adding LanguagePitfalls example
  ExceptionHandlingExercise
  adding Guava
  adding missing compiler version
  adding missing compiler version
  adding missing compiler version
  adding missing test libraries

Conflicts:
	pom.xml