Fix throwing exceptions in methods updateUser and updateNameTItles

- do not throw internalErrorException in impl when lastName is null, instead of it throw exception in entry and user IllegarlArgumentException
- if user is not updated, do not throw exception
- if user is not updated, do not log msg to auditerLog
- fix tests for these methods
Merge pull request #282 from stavamichal/fixUsingInternalErrorExceptionInUpdateUserAndUpdateNameTItles

Fix throwing exceptions in methods updateUser and updateNameTItles