test-bzr.sh, test-hg.sh: prepare for change to push.default=simple

Change 'git push <remote>' to 'git push <remote> <branch>' in one of
the test-bzr.sh tests to ensure that the test continues to pass when
the default value of push.default changes to simple.

Signed-off-by: Richard Hansen <rhansen@bbn.com>
Reviewed-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/remote-helpers/test-bzr.sh

@@ -379,7 +379,7 @@ test_expect_success 'export utf-8 authors' '
 	git add content &&
 	git commit -m one &&
 	git remote add bzr "bzr::../bzrrepo" &&
-	git push bzr
+	git push bzr master
 	) &&
 
 	(