merging cassandra explorer ui to trunk

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@167201 a5903396-d722-0410-b921-86c7d4935375
merging to trunk

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@167202 a5903396-d722-0410-b921-86c7d4935375