Few clean up on the BpmController
Closes #2081 (closed)
This MR fixes few things on the BpmCOntroller:
- Fixes data returned by
read_all
in order to fix numpy warning (now it is a list of value) - Rewrite
read_all
to make it simpler - Remove const
_acq_mode
- Add test to check that data from device are well mapped into the counters.