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/applier/framework/manager_applier.py

@@ -27,9 +27,9 @@ from watcher.common.messaging.messaging_core import MessagingCore
 from watcher.common.messaging.notification_handler import NotificationHandler
 from watcher.decision_engine.framework.messaging.events import Events
 
-CONF = cfg.CONF
 
 LOG = log.getLogger(__name__)
+CONF = cfg.CONF
 
 # Register options
 APPLIER_MANAGER_OPTS = [
@@ -51,7 +51,7 @@ APPLIER_MANAGER_OPTS = [
                help='The identifier used by watcher '
                     'module on the message broker')
 ]
-CONF = cfg.CONF
+
 opt_group = cfg.OptGroup(name='watcher_applier',
                          title='Options for the Applier messaging'
                                'core')