Merge branch 'exec_sysctl_immediately' into 'master'

Execute sysctl immediately.

Fixes #897 



See merge request !525

files/gitlab-cookbooks/gitlab/definitions/sysctl.rb

@@ -28,7 +28,7 @@ define :sysctl, value: nil do
 
   file "/opt/gitlab/embedded/etc/#{conf_name}" do
     content "#{name} = #{value}\n"
-    notifies :run, 'execute[load sysctl conf]'
+    notifies :run, 'execute[load sysctl conf]', :immediately
   end
 
   link "/etc/sysctl.d/#{conf_name}" do