fixed bug: null pointer exception in case of client credentials grant because user authentication is null
extended ddl file with extension tables and appropriate constraints,
increased db version and checking,
added some defaults to db seed xml for field names and extension
New implementation of scim-extension-entities
fixed Constants.CORE_SCHEMA change problems in the server
and in SCIMSearchResults. was Set before and is String now
Merge remote-tracking branch 'origin/develop' into develop