introduce number of resurce given for a indexing thread

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@178540 a5903396-d722-0410-b921-86c7d4935375
added sub-artifact description to be rendered in mediation library view

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@178541 a5903396-d722-0410-b921-86c7d4935375