message: Fix importing config from env var
diff: @@ -12,6 +12,7 @@ from __future__ import unicode_literals
  import imp
  import json
  import os
  +import sys
  from collections import OrderedDict
  from dateutil import tz
  @@ -308,7 +309,12 @@ try:
  # for case where app is being executed via pex.
  print('Loaded your LOCAL configuration at [{}]'.format(
  os.environ[CONFIG_PATH_ENV_VAR]))
  - imp.load_source('superset_config', os.environ[CONFIG_PATH_ENV_VAR])
  + module = sys.modules[__name__]
  + override_conf = imp.load_source('superset_config', os.environ[CONFIG_PATH_ENV_VAR])
  + for key in dir(override_conf):
  + if key.isupper():
  + setattr(module, key, getattr(override_conf, key))
  +
  else:
  from superset_config import * # noqa
  import superset_config
  