6.4 updated x-pack API's

(cherry picked from commit 37f9710)

Author: Mpdreamz

src/CodeGeneration/ApiGenerator/RestSpecification/XPack/Watcher/xpack.watcher.put_watch.json

@@ -25,7 +25,7 @@
     },
     "body": {
       "description" : "The watch",
-      "required" : true
+      "required" : false
     }
   }
 }