Update payments-wiki account instructions
Update payments-wiki account instructions

Values in puppet-managed are now clobbering the entire array, so
the override settings file needs to be in a different place.

Change-Id: I87e1b6380d0d49b8d364d58c2e136e9a84265455

wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant