added logic to revoke the older token. We invoke revoke endpoint

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180624 a5903396-d722-0410-b921-86c7d4935375
calling revoke endpoint to revoke the token.Removing status upadte for oldertokens..

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180625 a5903396-d722-0410-b921-86c7d4935375