Axes settings refactoring + channels refactoring

Closes #280

See merge request !658

Resolve "`mv` context manager"

Closes #265

See merge request !670

Standard cleanup manage default behavior on Axis, Lima,
and stoppable acquisition device.

Cleanup function is now moved to a separate file.

data/node.py: bug fix with wrong data node being returned by 'get_node'

See merge request !671

Revert previous commit 6a9f04, that introduced a bug with `get_node`
Finished tests

Added test

Beacon uds

Closes #261

See merge request !652

scan: synchronize run_number with writer in case of data node is removed.

Closes #208

See merge request !669

Fix issue #284

Closes #284

See merge request !668

Fix issue #286

Closes #286

See merge request !665

data/scan.py: use try...finally to set db_connection to the pipeline when calling .get on channels in get_data()

The pipeline won't be used for Lima channel - but at the moment we do
not retrieve Lima data in get_data