No output is given if modules configuration contains invalid values

[NotTheEvilOne]

@boekhorstb1 gave the following description:

I get no warning and no outputs when my setup misses configuration or has wrong configuration. Note, when addingg example to config.yaml, I get warnings. For example if there is no ceph configuration in .ceph:

# No usefull logs and no errors
migration_modules:
- bla

compare to:

# Usefull logs and lots of errors
migration_modules:
- example

@NotTheEvilOne

Originally posted by @boekhorstb1 in #54 (comment)