Lint: F821 undefined name 'config'

This variable is set after importing these files by the flaskapi module.
Thus, simply set a default at the top of each file to avoid linting
errors.

api-daemon/pvcapid/benchmark.py

@@ -28,6 +28,8 @@ from distutils.util import strtobool as dustrtobool
 import daemon_lib.common as pvc_common
 import daemon_lib.ceph as pvc_ceph
 
+config = None  # Set in this namespace by flaskapi
+
 def strtobool(stringv):
     if stringv is None:
         return False