matrix: Restart mjolnir on failure

With a delay of 30 seconds. Reduce the sleep hack in pantalaimon from 30
to 10 seconds. Hopefully this is going to bring it up reliably.

roles/matrix/files/mjolnir.service

@@ -9,6 +9,8 @@ WorkingDirectory=/var/lib/synapse/mjolnir
 Environment=NODE_ENV=production
 Environment=NODE_CONFIG_DIR=/etc/synapse/mjolnir
 ExecStart=/usr/bin/node --dns-result-order=ipv4first lib/index.js
+Restart=on-failure
+RestartSec=30s
 
 [Install]
 WantedBy=multi-user.target

roles/matrix/files/pantalaimon.service

@@ -9,7 +9,7 @@ WorkingDirectory=~
 ExecStart=/var/lib/synapse/venv-pantalaimon/bin/pantalaimon \
   -c /etc/synapse/pantalaimon.conf \
   --data-path /var/lib/synapse/pantalaimon-data
-ExecStartPost=/usr/bin/sleep 30
+ExecStartPost=/usr/bin/sleep 10
 
 [Install]
 WantedBy=multi-user.target