Committing rollback utility method

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@178199 a5903396-d722-0410-b921-86c7d4935375
Using IdentityDatabaseUtil from identity.core instead of DatabaseUtil from user.core

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@178200 a5903396-d722-0410-b921-86c7d4935375