Merge pull request #608 from patriot1burke/master

jiras
Merge pull request #609 from patriot1burke/master

fixes
Improve TimerSPI to support cancelling of previously scheduled tasks
Sync - first iteration
Support for periodic users sync
Merge pull request #610 from mposolda/master

Support for users sync
Fix transaction handling in KeycloakModelUtils.runJobInTransaction. Start sync tasks for configured federation providers at startup
Merge pull request #611 from mposolda/master

Fix transaction handling in KeycloakModelUtils.runJobInTransaction. Star...
KEYCLOAK-616 Not require registration to add a new social user
Merge pull request #612 from stianst/master

KEYCLOAK-616 Not require registration to add a new social user
add jpa realm attributes