align inventory template

inventory.yml.dist

@@ -29,14 +29,12 @@ hosts:
   production:
     <<: *base
     branch: rel_7.0.x
-    db_name: myProdDatabase                              # optional for database actions
     labels:
       role: production                                   # production | stage | development
 
   development:
     <<: *base
     branch: dev_7.1.x
-    db_name: myDevDatabase                               # optional for database actions
     keep_releases: 1
     composer_options: --verbose --prefer-dist --no-progress --no-interaction  # without no-dev option
     labels: