Rvr classes block all default logging making integration to existing projects difficult

[ollipal]

To reproduce (based on getting_started/asyncio/driving/drive_raw_motors.py):

import asyncio
import logging
from sphero_sdk import SpheroRvrAsync
from sphero_sdk import SerialAsyncDal
from sphero_sdk import RawMotorModesEnum

# setup and test logging
logging.getLogger().setLevel(logging.INFO)
logging.info("Now the default logging works")

loop = asyncio.get_event_loop()
rvr = SpheroRvrAsync(
    dal=SerialAsyncDal(
        loop
    )
)

logging.info("Now it does not")

This result is probably not intended, because it makes integration with existing projects more complicated.

The behavior is caused by logging_config.py's 'null_handler', so the workarounds are ether to set SpheroRvrAsync's log_level to 2, which also cause other additional logs from the rover or to remove the 'null_handler' handler with

null_handler = [h for h in logging.getLogger().handlers if h.name == "null_handler"][0]
logging.getLogger().removeHandler(null_handler)

after the RVR has been initialized.

The proper solution would probably be to create and use a new named logger for the sdk, and block that when using LogLevel.Silent.