Init checkin for group.c and group.h
Bug Fix 851 - Add support for neg group cache.  Also uses new QAS api call to LDAP lookups for group information when QAS is not joined
disabled trace debug
Added ability to set the negative group cache max size and expiration time, as well as insuring backwards compatibility with older versions of QAS that do not have the new API call vas_auth_check_client_membership_with_server_id.