SWS-656 - ResponseMatcher.payload(Resource payload) should be static

test/src/main/java/org/springframework/ws/test/server/ResponseMatchers.java

@@ -5,7 +5,7 @@
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *      http://www.apache.org/licenses/LICENSE-2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -64,7 +64,7 @@ public abstract class ResponseMatchers {
      * @param payload the XML payload
      * @return the response matcher
      */
-    public ResponseMatcher payload(Resource payload) throws IOException {
+    public static ResponseMatcher payload(Resource payload) throws IOException {
         return payload(new ResourceSource(payload));
     }