Add the postgresql_client role to the mastodon role

This will add the firewall rule and pg_hba access rule on the PostgreSQL
servers

nodes/andromeda.kosmos.org.json

@@ -24,9 +24,9 @@
     "ipaddress": "46.4.18.160",
     "roles": [
       "base",
-      "postgresql_primary",
       "mastodon",
-      "ejabberd"
+      "ejabberd",
+      "postgresql_client"
     ],
     "recipes": [
       "kosmos-base",
@@ -130,7 +130,6 @@
     "recipe[kosmos-base::andromeda_firewall]",
     "recipe[kosmos-ipfs]",
     "recipe[kosmos-ipfs::public_gateway]",
-    "role[postgresql_primary]",
     "recipe[kosmos-btcpayserver::proxy]",
     "role[mastodon]",
     "role[ejabberd]",