Fix issue of "No handlers could be found for logger"

Refer websocket-client/websocket-client@67e195a

Author: trinhpham

reportportal_client/service.py

@@ -2,12 +2,12 @@
 import json
 import requests
 import uuid
-from logging import getLogger
+import logging
 
 from .errors import ResponseError, EntryCreatedError, OperationCompletionError
 
-logger = getLogger(__name__)
-
+logger = logging.getLogger(__name__)
+logger.addHandler(logging.NullHandler())
 
 def _get_id(response):
     try:

reportportal_client/service_async.py

@@ -1,14 +1,14 @@
 import sys
 import threading
-from logging import getLogger
+import logging
 
 from six.moves import queue
 
 from .service import ReportPortalService
 from .errors import Error
 
-logger = getLogger(__name__)
-
+logger = logging.getLogger(__name__)
+logger.addHandler(logging.NullHandler())
 
 class QueueListener(object):
     _sentinel_item = None