merging issue reported under {https://wso2.org/jira/browse/ESBJAVA-3094}

1.When back-end server return 200 OK with No Content Type with Empty Body, ESB responses with binary message which invalid according to the specification, the give patch will terminate such operations.

2.When back-end server returns 200 OK without body, ideally ESB should be able to by pass the request without processing (In cases where client waits for 200 Ok without body requirements)