common/heartbeat_service.py sets up logging to stderr

[Robin Murray]

wavefront-sdk-python/wavefront_sdk/common/heartbeater_service.py

Line 18 in 3a1e89a

 logging.basicConfig(level=logging.INFO) 

heartbeater_service.py calls logging.basicConfig() such that it configures the python logging library to log at INFO level to stderr for the whole application.

https://docs.python.org/3.3/howto/logging.html#configuring-logging-for-a-library