Inappropriate caching of Members in Hib3MemberDAO requires JVM restart to pick up changes to database from other JVM

Apparently we cache MemberDTO objects against uuid in Hib3MemberDAO:

private static HashMap<String, MemberDTO> uuid2dtoCache = new HashMap<String, MemberDTO>();

Also Hib3GroupDAO has:

private static HashMap<String, Boolean> existsCache = new HashMap<String, Boolean>();

These should be changed to use Ehcaches. This will require configuration of two new caches and changes to the DAO code