Add common module managing common services and scripts (act_runner, create/restore backups)

Fix script environment variables
Add Fefan configuration
Fix gateway services file provisionning through ssh

modules/apps/fefan/cloud-init/service.yaml

@@ -30,11 +30,7 @@ mounts:
   - [ "192.168.1.12:/main/backups", "/backups", "nfs", "defaults,_netdev,x-systemd.requires=network-online.target", "0", "0" ]
 
 write_files:
-  - path: /opt/fefan/env.sh
-    permissions: "0644"
-    content: |
-      ${environment-setup-script}
-  - path: /opt/fefan/fefan.env
+  - path: /opt/environment/.env
     permissions: "0644"
     content: |
       ${env-file-content}
@@ -69,7 +65,7 @@ write_files:
   - path: /opt/fefan/install-fefan.sh
     permissions: "0755"
     content: |
-      ${fefan-install-script}
+      ${service-install-script}
 
 runcmd:
   # Backup setup