upgrade script for secure Fuel Master services

Here the dict that we need to add to astute.yaml when upgrading from 5.0 to 5.1:
"astute/user": "naily",
"astute/password": "naily",
"cobbler/user": "cobbler",
"cobbler/password": "cobbler",
"mcollective/user": "mcollective",
"mcollective/password": "marionette",
"postgres/keystone_dbname": "keystone",
"postgres/keystone_user": "keystone",
"postgres/keystone_password": "keystone",
"postgres/nailgun_dbname": "nailgun",
"postgres/nailgun_user": "nailgun",
"postgres/nailgun_password": "nailgun",
"postgres/ostf_dbname": "ostf",
"postgres/ostf_user": "ostf",
"postgres/ostf_password": "ostf",

Note that / represents a subdict and is not a literal slash in the yaml key.