Initialize defaults in WebServiceTemplate constrs

Make sure that initDefaultStrategies is called from all
WebServiceTempalte constructors, including the ones that take
(Un)Marhsaller as arguments.

Issue: SWS-844

core/src/main/java/org/springframework/ws/client/core/WebServiceTemplate.java

@@ -164,6 +164,7 @@ public class WebServiceTemplate extends WebServiceAccessor implements WebService
             this.setMarshaller(marshaller);
             this.setUnmarshaller((Unmarshaller) marshaller);
         }
+	    initDefaultStrategies();
     }
 
     /**
@@ -178,6 +179,7 @@ public class WebServiceTemplate extends WebServiceAccessor implements WebService
         Assert.notNull(unmarshaller, "unmarshaller must not be null");
         this.setMarshaller(marshaller);
         this.setUnmarshaller(unmarshaller);
+	    initDefaultStrategies();
     }
 
     /** Returns the default URI to be used on operations that do not have a URI parameter. */