logging: logging format from R-Commons

* Closes reanahub/reana#129.

reana_workflow_engine_yadage/config.py

@@ -30,3 +30,6 @@
                                                               BROKER_URL))
 
 MOUNT_CVMFS = os.getenv('REANA_MOUNT_CVMFS', 'false')
+
+LOGGING_MODULE = 'reana-workflow-engine-yadage'
+"""REANA Workflow Engine Yadage logging module."""

reana_workflow_engine_yadage/externalbackend.py

@@ -20,10 +20,10 @@
 from reana_commons.api_client import JobControllerAPIClient as rjc_api_client
 
 from .celeryapp import app
-from .config import MOUNT_CVMFS
+from .config import LOGGING_MODULE, MOUNT_CVMFS
 from .utils import REANAWorkflowStatusPublisher
 
-log = logging.getLogger('yadage.cap.externalproxy')
+log = logging.getLogger(LOGGING_MODULE)
 
 
 def make_oneliner(job):

reana_workflow_engine_yadage/tasks.py

@@ -18,11 +18,14 @@
 from yadage.steering_api import steering_ctx
 from yadage.utils import setupbackend_fromstring
 
-from .config import SHARED_VOLUME_PATH
+from reana_commons.config import REANA_LOG_FORMAT, REANA_LOG_LEVEL
+
+from .config import LOGGING_MODULE, SHARED_VOLUME_PATH
 from .tracker import REANATracker
 from .utils import REANAWorkflowStatusPublisher
 
-log = logging.getLogger(__name__)
+logging.basicConfig(level=REANA_LOG_LEVEL, format=REANA_LOG_FORMAT)
+log = logging.getLogger(LOGGING_MODULE)
 
 
 def load_json(ctx, param, value):

reana_workflow_engine_yadage/tracker.py

@@ -18,9 +18,10 @@
 import networkx as nx
 from yadage.utils import WithJsonRefEncoder
 
+from .config import LOGGING_MODULE
 from .utils import REANAWorkflowStatusPublisher
 
-log = logging.getLogger(__name__)
+log = logging.getLogger(LOGGING_MODULE)
 
 
 def analyze_progress(adageobj):