CAS-1251: Move the JsonExceptionView resolver to the management webapp module, make sure only ajax exceptions are handled by the resolver. Fixed a bug with the management webapp's prefix and cleaned up the poms.

Ported Scott's HtmlEscapedExceptionMessageExceptionHandler.
CAS-1251: Move the JsonExceptionView resolver to the management webapp

Addressed issues raised by Scott. Fixed the import location, used a direct "return null" instead of a stale variable and removed the message key constant.
Merge branch 'master' into CAS-1251

Conflicts:
	cas-server-webapp/pom.xml
CAS-1251: Move the JsonExceptionView resolver to the management webapp

Fixed exclusions tag issue with pom that had made its way into the commit via a malformed merge with master.
Added an empty line after the import statements in ajax exc resolver class.
Merge pull request #191 from Unicon/CAS-1251

CAS-1251: Move the JsonExceptionView resolver to the management webapp