remove caching.core dependency

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@177728 a5903396-d722-0410-b921-86c7d4935375
adding afterclass method to remove webapp

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@177729 a5903396-d722-0410-b921-86c7d4935375