Merge branch 'sh-bump-rugged-0.27.5' into 'master'

Bump rugged to 0.27.5 for security fixes

See merge request gitlab-org/gitlab-ce!22208

Author: Robert Speicher

Gemfile.lock

@@ -797,7 +797,7 @@ GEM
     rubyzip (1.2.2)
     rufus-scheduler (3.4.0)
       et-orbi (~> 1.0)
-    rugged (0.27.4)
+    rugged (0.27.5)
     safe_yaml (1.0.4)
     sanitize (4.6.6)
       crass (~> 1.0.2)

Gemfile.rails5.lock

@@ -805,7 +805,7 @@ GEM
     rubyzip (1.2.2)
     rufus-scheduler (3.4.0)
       et-orbi (~> 1.0)
-    rugged (0.27.4)
+    rugged (0.27.5)
     safe_yaml (1.0.4)
     sanitize (4.6.6)
       crass (~> 1.0.2)