Add type checking to logger

[tkevinbest]

Errors in the logger are very hard to debug. You need to supply names very specifically or you get weird errors.

This syntax worsk:
osl.log.add_attributes(torqueSensor, ["torque"])
but this would fail with a weird error:
osl.log.add_attributes(torqueSensor, "torque")

A check in the add_attributes method would be very helpful!

[senthurayyappan]

Added a type check to the add_attributes() method. It will now raise a [LOGGER] attributes argument must be a list of strings (example: ['a','b']), not {type(attributes)} and fail elegantly when a wrong type is passed.

Please checkout the dev branch [cfb806c].