CAS-1262: Remove TGT dependency on TicketGrantingTicketImpl
CAS-1262: TGT id, which cannot be null, uniquely identifies the ticket such that its hash code is suitable as the whole ticket's hash code.
CAS-1257: Allow support for custom attribute filters when validating a service

By factoring out the attribute filtering process out of CASImpl, support could be made available via custom injection of filters that would do more other than making sure a registered service received the right set of allowed attributes. This commit places the mapping of filters and services inside the services management tool, and provide a regex attr filter.
CAS-1257: Cleaned up the regex attr filter to no longer be an extension of the default.
CAS-1262: Restored the static logger back. Static loggers are appropriate in this scenario since there are a lot instances of this class
CAS-1262: Removed transient annotation.
CAS-1257: Merge branch 'master' into CAS-1257-1
Merge pull request #207 from leleuj/CAS-1264

CAS-1264: Move OpenIdProviderController from webapp to OpenID module
Merge pull request #208 from leleuj/CAS-1264

CAS-1264: Move OpenIdProviderController from webapp to OpenID module
Merge pull request #204 from Unicon/CAS-1257-1

CAS-1257: Allow support for custom attribute filters when validating a service
Merge pull request #202 from Unicon/CAS-1262

CAS-1262: Remove TGTImpl dependency on AbstractTicket
CAS-1265: Improve log messages of CASImpl
NOJIRA: Fixed an issue with the failing test where the return count of a regex filter was incorrectly configured.
CAS-1266: Remove Persistence.xml as test resource
CAS-1268: Validate registered service before delegating TGT and authentication attempts
CAS-1265: Corrected typos, used same log message for the disabled svc exception.
CAS-1266: Resolved the resource dependency between webapp and core, removed persistence.xml for the webapp.
CAS-1269: Upgrade to EhCache 2.6.5
NOJIRA: Updated NOTICE files for all projects as a result of running mvn notice:check
CAS-1268: Unit tests