Changing default transport in API Manager to Pass-Through

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@179705 a5903396-d722-0410-b921-86c7d4935375
adding new method to filter inputs

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@179706 a5903396-d722-0410-b921-86c7d4935375