GEOS-5813: Added LDAP based GeoServerRoleService
GEOS-5813: integrated userFilter cfg parameter for better ActiveDirectory support
GEOS-5813: fixed unit tests
Merge pull request #392 from mbarto/geos5813_ldap_roleservice

GEOS-5813: Added LDAP based GeoServerRoleService
[GEOS-6151] WPS can report progress percentage above 100 with asynch process execution