Merge pull request #223 from stianst/master

KEYCLOAK-298 If admin or accnt mngmt cookies are invalid, the identity cookie was expired by mistake
KEYCLOAK-319 Use keycloak-ds.xml just in WAR distribution
Added docs section about tested databases
KEYCLOAK-321 Allow distribution to use MongoDB model
Merge pull request #224 from mposolda/master

Update docs about supported RDBMS and MongoDB. Few improvements in distribution
KEYCLOAK-284 Subject in token is now user id instead of username