Fix soup state.apply args for postgres provisioning

state.apply takes a single mods argument; space-separated names are not
a list, so `state.apply postgres.auth postgres.telegraf_users` was only
applying postgres.auth and silently dropping the telegraf_users state.

Use comma-separated mods and add queue=True to match the rest of soup.

salt/manager/tools/sbin/soup

@@ -496,7 +496,7 @@ post_to_3.1.0() {
   # container. Then push a telegraf state to every minion so their telegraf.conf
   # picks up the new credentials on the first apply after soup.
   echo "Provisioning Telegraf Postgres users for existing minions."
-  salt-call --local state.apply postgres.auth postgres.telegraf_users || true
+  salt-call --local state.apply postgres.auth,postgres.telegraf_users queue=True || true
 
   POSTVERSION=3.1.0
 }