Fix changeMessageNotExtendedForNonCodeOwnerApproval test

The changed files were not owned by the calling users, hence the change
message would not be extended regardless of the label on which the
voting is done.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Ie90fe27ee663dbafbbaa15eec06057f72233e51c
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnersOnPostReviewIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnersOnPostReviewIT.java
index c5afe3c..29a47e5 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnersOnPostReviewIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnersOnPostReviewIT.java
@@ -271,11 +271,7 @@
         .addCodeOwnerEmail(admin.email())
         .create();
 
-    String changeId =
-        createChange(
-                "Test Change",
-                ImmutableMap.of("bar/foo.baz", "file content", "bar/baz.foo", "file content"))
-            .getChangeId();
+    String changeId = createChange("Test Change", "foo/bar.baz", "file content").getChangeId();
 
     recommend(changeId);