Merge branch 'qa-fix-timestamp' into 'master'

[QA] Fix duplicate year in namespace name

See merge request gitlab-org/gitlab-ce!20581

qa/qa/runtime/namespace.rb

@@ -8,7 +8,7 @@ module QA
       end
 
       def name
-        'qa-test-' + time.strftime('%d-%m-%Y-%H-%M-%S')
+        "qa-test-#{time.strftime('%Y-%m-%d-%H-%M-%S')}"
       end
 
       def path