Make the ansible check diff run serial instead of parallel.

scripts/ansible-playbook-check-diff

@@ -18,8 +18,4 @@ for dir in ("hosts", "groups"):
             playbookpath = os.path.join(path, file)
             cmd = ("ansible-playbook", playbookpath, "--check", "--diff")
             ansibleprocess = subprocess.Popen(cmd)
-
-#
-# Add this if you want to run them one at a time instead of all forked off in a bunch.
-#            ansibleprocess.communicate() 
-#
+            ansibleprocess.communicate()