Upgrade Mastodon to latest version

Using a new branch with freshly added Kosmos changes on top of the
upstream release code.

nodes/mastodon-1.json

@@ -8,7 +8,7 @@
   "automatic": {
     "fqdn": "mastodon-1",
     "os": "linux",
-    "os_version": "5.4.0-1031-kvm",
+    "os_version": "5.4.0-1050-kvm",
     "hostname": "mastodon-1",
     "ipaddress": "192.168.122.197",
     "roles": [
@@ -18,7 +18,7 @@
     "recipes": [
       "kosmos-base",
       "kosmos-base::default",
-      "kosmos-postgresql::hostsfile",
+      "kosmos_postgresql::hostsfile",
       "kosmos-mastodon",
       "kosmos-mastodon::default",
       "kosmos-mastodon::nginx",