CE upstream

CE changes https://gitlab.com/gitlab-org/gitlab-ce/compare/d636efbe26ee51030bb108d889c2ef867570358a...0c36b810abede73b3cf59f951e7467dbac54ec98?expand_all_diffs=1

features/project/network_graph.feature

@@ -43,4 +43,4 @@ Feature: Project Network Graph
   Scenario: I should fail to look for a commit
     When I look for a commit by ";"
-    Then page status code should be 404
+    Then I should see non-existent git revision error message