CAS-1265: Improve log messages of CASImpl
CAS-1265: Corrected typos, used same log message for the disabled svc exception.
CAS-1265: Improved clearpass logging.
CAS-1265: Added a new serialized version id for the invalid ticket exception class.
CAS-1265: Reformatted warning line that is executed for proxy attempts.
Merge pull request #210 from Unicon/CAS-1265

CAS-1265: Improve log messages of CASImpl