fixing old methods for tenants 

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180708 a5903396-d722-0410-b921-86c7d4935375
fixing cassandra build failure

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180709 a5903396-d722-0410-b921-86c7d4935375
adding create default role 

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180710 a5903396-d722-0410-b921-86c7d4935375