fix for issue IDENTITY-1571

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180658 a5903396-d722-0410-b921-86c7d4935375
adding db schema changes for resource levek throttling

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180659 a5903396-d722-0410-b921-86c7d4935375