Upgrading servlet

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@163053 a5903396-d722-0410-b921-86c7d4935375
Merging branch to trunk

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@163054 a5903396-d722-0410-b921-86c7d4935375