Show commits from source project. Be consistent with:

MergeRequest#pipeline Fixes #3596

Show commits from source project. Be consistent with:
d2a9eefb · Lin Jen-Shin · 958815a0 · d2a9eefb
Commit d2a9eefb authored 8 years ago by Lin Jen-Shin
--- a/app/views/projects/merge_requests/show/_commits.html.haml
+++ b/app/views/projects/merge_requests/show/_commits.html.haml
@@ -3,4 +3,4 @@
  Most recent commits displayed first
 %ol#commits-list.list-unstyled
-  = render "projects/commits/commits", project: @merge_request.project
+  = render "projects/commits/commits", project: @merge_request.source_project