syncing trunk sources with the 4.1.5 public branch

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@177708 a5903396-d722-0410-b921-86c7d4935375
fixing test failure

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@177709 a5903396-d722-0410-b921-86c7d4935375
Adding missing svn external with chanika's patch.

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@177712 a5903396-d722-0410-b921-86c7d4935375