Merge pull request #532 from patriot1burke/master

jpa schema changes
Minor improvement in AbstractKeycloakRule.stopServer()
Added method UserProvider.getUsersCount(). Refactor export-import with users pagination available
Fix testsuite to use mongo for realms,users and audit when keycloak.realm.provider=mongo
Merge pull request #533 from mposolda/master

Added method UserProvider.getUsersCount(). Refactor export-import witth users pagination
Removed long ids and replaced with composite ids
Commented out test in ExportImportTest that breakes the other tests
Merge pull request #534 from stianst/master

Removed long ids and replaced with composite ids
named queries and roleId in RoleMapping
realmId and roleId used in User and user relationships
db schema