Adjust alert message

Author: tamasvajk

java/ql/src/Language Abuse/EmptyMethod.ql

@@ -90,4 +90,4 @@ where
   not m.isDefault() and
   //native methods have no body
   not m.isNative()
-select m, "Empty method found."
+select m, "This empty method should be completed."

java/ql/test/query-tests/EmptyMethod/EmptyMethod.expected

@@ -1 +1 @@
-| Test.java:13:15:13:16 | f2 | Empty method found. |
+| Test.java:13:15:13:16 | f2 | This empty method should be completed. |