Fix config loading when running the watcher-api

This regression was caused when we upgrade the version of olso.
Unfortunately this issue wasn't picked up with the unit tests as
the cmds doesn't have unit tests yet.

Error message: "watcher-api fail with NoSuchOptError: no such option:debug"

This patchset implements unit tests for:

- 'watcher-api' command
- 'watcher-db-manage' command (and sub-command)
- 'watcher-applier' command

Change-Id: I2bea8aee28dec913ebc45f2824bf474f86652642

watcher/cmd/decisionengine.py

@@ -28,18 +28,13 @@ from watcher.decision_engine.framework.manager_decision_engine import \
     DecisionEngineManager
 from watcher import i18n
 
-cfg.CONF.import_opt('hostname',
-                    'watcher.metrics_engine.framework.'
-                    'datasources.influxdb_collector',
-                    group='watcher_influxdb_collector')
-
 LOG = logging.getLogger(__name__)
 CONF = cfg.CONF
 _LI = i18n._LI
 
 
 def main():
-    cfg.CONF(sys.argv[1:], project='watcher')
+    cfg.CONF(sys.argv[1:], project='python-watcher')
     logging.setup(CONF, 'watcher')
 
     LOG.info(_LI('Starting server in PID %s') % os.getpid())