Error corrections

* Bug 70: Content-Type removed from the 204 response of Terminate Subscription in
  VNF Fault Management API.

Change-Id: I07d3a94631295bab11c9dbb791c8f89ea7f93bfd
Signed-off-by: Gergely Csatari <gergely.csatari@nokia.com>

src/SOL003/VNFFaultManagement/VNFFaultManagement.yaml

@@ -483,14 +483,6 @@ paths:
 
             The subscription resource was deleted successfully.
             The response body shall be empty.
-          headers:
-            Content-Type:
-              description: >
-                The MIME type of the body of the request.
-                Reference: IETF RFC 7231
-              type: string
-              maximum: 1
-              minimum: 1
         400:
           $ref: "../../responses/SOL002SOL003_resp.yaml#/responses/400"
         401: