Added wiki-page search for 5-2-stable, Fixed issue #4310

Created by: coverer

Since the master travis-ci build failed somehow, I applied the patch to a clean 5-2-stable and it works on our production machine.

You can now search for content in wiki pages. It gives the page, but not a snippet of the page, that may be a nice improvement for the future.

lib/tasks/gitlab/check.rake

@@ -588,7 +588,7 @@ namespace :gitlab do
     def check_sidekiq_running
       print "Running? ... "
-      if run_and_match("ps aux | grep -i sidekiq", /sidekiq \d\.\d\.\d.+$/)
+      if run_and_match("ps aux | grep -i sidekiq", /sidekiq \d+\.\d+\.\d+.+$/)
         puts "yes".green
       else
         puts "no".red