Don't crash when kadeploy data is missing for clusters not in default or production queues.
This merge request is related to toulouse-estats installation.
Because estats is an experimental cluster, we need to perform a few tests with kadeploy-devel before allowing deployment on kadeploy.
This wasn't possible, since the rake gen:puppet:kadeployg5k SITE=toulouse
crashed when generating the configuration.
This merge request allows the generation of only the kadeploy-dev configuration in the following case:
- The cluster is not in default or production queue.
- The cluster is not declared in generators/kadeploy/kadeployg5k.yaml but is declared in the -dev.yaml generator