Add ZWO camera bandwidthoverload arg

[danjampro]

• Huntsman ZWO cameras are suffering from USB timeout issues
• Possible solution is to modify the BANDWIDTHOVERLOAD control value
• This PR adds an argument to the ZWO camera class to allow this to be easily set from config

[codecov[bot]]

Codecov Report

Merging #1071 (08b330c) into develop (cb4d26e) will increase coverage by 0.30%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #1071      +/-   ##
===========================================
+ Coverage    84.76%   85.07%   +0.30%     
===========================================
  Files           77       78       +1     
  Lines         6531     6598      +67     
  Branches       560      560              
===========================================
+ Hits          5536     5613      +77     
+ Misses         836      827       -9     
+ Partials       159      158       -1     

Impacted Files	Coverage Δ
tests/test_mount.py	100.00% <0.00%> (ø)
src/panoptes/pocs/camera/camera.py	83.44% <0.00%> (+0.46%)	:arrow_up:
src/panoptes/pocs/focuser/focuser.py	76.24% <0.00%> (+1.91%)	:arrow_up:
src/panoptes/pocs/dome/astrohaven.py	80.55% <0.00%> (+2.77%)	:arrow_up:

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[Physarah]

Sorry Dan I don't have write access ;P

[wtgee]

@Physarah Is a property needed? Why not the solution presented in your description in https://github.com/AstroHuntsman/huntsman-pocs/issues/330?

[danjampro]

@Physarah Is a property needed? Why not the solution presented in your description in AstroHuntsman/huntsman-pocs#330?

@wtgee The problem is that these errors are random. We'll have to run many exposures during normal pocs operation to see if this makes a difference. This method will allow us to easily configure e.g. half the cameras on 100% and the other half on a lower value.

[danjampro]

@wtgee we discussed this and agreed a property is appropriate. Can we merge?