Log config options with oslo.config

This removes some custom code inherited from Cinder which was handling
the output of secret options in a bad way. This patch utilizes Oslo's
existing utilities to output the Manila configuration options securely.

Filtering will be done with the "secret=True" option flag.

Major thanks to Eric Harney for introducing this fix to Cinder.

Change-Id: I894e011680661c0b73b9592f70a6457e403f18c6
Related-Bug: #1750074

manila/service.py

@@ -387,18 +387,7 @@ def serve(server, workers=None):
 
 
 def wait():
-    LOG.debug('Full set of CONF:')
-    for flag in CONF:
-        flag_get = CONF.get(flag, None)
-        # hide flag contents from log if contains a password
-        # should use secret flag when switch over to openstack-common
-        if ("_password" in flag or "_key" in flag or
-                (flag == "transport_url" and "rabbit:" in flag_get) or
-                (flag == "sql_connection" and "mysql:" in flag_get)):
-            LOG.debug('%(flag)s : FLAG SET ', {"flag": flag})
-        else:
-            LOG.debug('%(flag)s : %(flag_get)s',
-                      {"flag": flag, "flag_get": flag_get})
+    CONF.log_opt_values(LOG, log.DEBUG)
     try:
         _launcher.wait()
     except KeyboardInterrupt:

releasenotes/notes/use-oslo-logging-for-config-options-388da64bb4ce45db.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - Use Oslo's logging features to securely output the configuration options
+    for Manila.
+