Merge branch 'blame_fix' into 'master'

Improve perofrmance of git blame

https://gitlab.com/gitlab-org/gitlab-ce/issues/2286

Now, it's four times as faster.

See merge request !1209

CHANGELOG

@@ -18,6 +18,7 @@ v 8.0.0 (unreleased)
   - Gracefully handle SMTP user input errors (e.g. incorrect email addresses) to prevent Sidekiq retries (Stan Hu)
   - Improve abuse reports management from admin area
   - Move dashboard activity to separate page
+  - Improve performance of git blame
 
 v 7.14.1 (unreleased)
   - Only include base URL in OmniAuth full_host parameter (Stan Hu)

app/views/projects/blame/show.html.haml

@@ -27,7 +27,7 @@
                 .light
                   = commit_author_link(commit, avatar: false)
                   authored
-                  #{time_ago_with_tooltip(commit.committed_date)}
+                  #{time_ago_with_tooltip(commit.committed_date, skip_js: true)}
             %td.lines.blame-numbers
               %pre
                 - line_count = blame_group[:lines].count