[canalyst] get CANalyst-II working through init, once more

[dankamongmen]

• Switch 'baud' to 'bitrate' from canalystii.py
• Pass kwargs through to BusABC's initializer

With these two changes, I was able to get can-logger to start on either one of my CANalyzer-II without a ~/.canrc. Without them, I just saw a bunch of errors.

[schwarzgerat](0) $ cat ~/.canrc 
[default]
interface=canalystii
[schwarzgerat](0) $ python3 -m can.logger -i canalystii -c 1 -b 125000
success: device 04D8:0053 opened
success: set configuration #1
success: claim_interface #0
Connected to CANalystIIBus: CANalyst-II: device 0, channels [1]
Can Logger (Started on 2019-06-08 11:36:42.903185)
unknown file type "None", falling pack to can.Printer
[schwarzgerat](0)

Prior to this change, I'd get stuff like:

TypeError: __init__() got an unexpected keyword argument 'single_handle'

Failed tests hold steady at 2.

[codecov]

Codecov Report

Merging #617 into develop will not change coverage.
The diff coverage is 0%.

@@          Coverage Diff           @@
##           develop   #617   +/-   ##
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  Coverage       64%    64%           
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  Files           63     63           
  Lines         5607   5607           
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  Hits          3589   3589           
  Misses        2018   2018