- Added checks in UnitGenerator

- When a unit cannot be built, UnitGenerator does not abort anymore;
error log messages are produced, and it proceeds with the next unit

- Fixed a bug that prevented pipelines in collectagent deployments
- Incremented the tolerance threshold of fuzzy queries to 1h
- Fixed the assignment of MQTT topics to job sensors

Caliper-plugin QOL improvement
Add missing config documentation for Caliper service

Create sensor names from mqttsuffix if not configured otherwise and vice versa. For sensor groups that use entities, create group name from entity name if not configured otherwise.

Allow for empty plugin configuration subtrees, i.e. don't have to specifiy config or path parameters if defaults should be used anyway