adding jmx stub

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@167243 a5903396-d722-0410-b921-86c7d4935375
adding jmx data agent to the data-agent parent pom

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@167244 a5903396-d722-0410-b921-86c7d4935375
adding jmx agent feature to the parent pom

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@167245 a5903396-d722-0410-b921-86c7d4935375