including working version of refactored throttling module, in to the build

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@178812 a5903396-d722-0410-b921-86c7d4935375
deleting .mar component. merged it in to core component

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@178813 a5903396-d722-0410-b921-86c7d4935375