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/api/app.py

@@ -49,8 +49,7 @@ CONF.register_opts(strategy_selector.WATCHER_GOALS_OPTS)
 
 def get_pecan_config():
     # Set up the pecan configuration
-    filename = api_config.__file__.replace('.pyc', '.py')
-    return pecan.configuration.conf_from_file(filename)
+    return pecan.configuration.conf_from_dict(api_config.PECAN_CONFIG)
 
 
 def setup_app(config=None):

watcher/api/config.py

@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import unicode_literals
+
 from oslo_config import cfg
 from watcher.api import hooks
 
@@ -42,5 +44,11 @@ app = {
 # WSME Configurations
 # See https://wsme.readthedocs.org/en/latest/integrate.html#configuration
 wsme = {
-    'debug': cfg.CONF.debug,
+    'debug': cfg.CONF.get("debug") if "debug" in cfg.CONF else False,
+}
+
+PECAN_CONFIG = {
+    "server": server,
+    "app": app,
+    "wsme": wsme,
 }