Automated OLM generation and verification

[nolar]

Kopf-based operators can benefit from being compatible with Operator Lifecycle Manager (OLM). Quick intro video: https://youtu.be/nGM2s4-Qr74

For that, Kopf can help by generation of the YAML definitions based on the source code of the operator (e.g. utilised resources, operator's docstrings, setup.py if present).

Sample YAML files: https://github.com/operator-framework/operator-sdk-samples/tree/master/memcached-operator/deploy/olm-catalog/memcached-operator

This is also related to #49 (RBAC templates generation/verification).

This tasks needs research on how OLM works, some hands-on practice, before making any specific suggestions. EphemeralVolumeClaim operator looks like a good candidate, once finished in #97.