Multiple Configuration tests.
[PLINK-387] - Create producer method for PersistentPermissionVoter.
[PLINK-387] - Removing unused code.
Merge pull request #272 from pedroigor/PLINK-387

[PLINK-387] - Create producer method for PersistentPermissionVoter.
Minor issue when users have the same loginName using different stores.
[PLINK-418] - AuthenticationFilter is returning HTTP Status Code 500 when any AuthenticationException is thrown.
Merge pull request #273 from pedroigor/PLINK-418

[PLINK-418] - AuthenticationFilter is returning HTTP Status Code 500 when any AuthenticationException is thrown.
[PLINK-387] - Support for privilege inheritence chains.