Add logging config values

This commit adds logging config values to Tempest. Users of Tempest can
know the config values exactly when Tempest runs.

Change-Id: I4ae50021812b7c49e26c19ef1db941e2eccec8c4
diff --git a/tempest/config.py b/tempest/config.py
index ccb3125..122c79f 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -15,6 +15,7 @@
 
 from __future__ import print_function
 
+import logging as std_logging
 import os
 
 from oslo.config import cfg
@@ -803,6 +804,9 @@
             self.compute_admin.password = self.identity.admin_password
             self.compute_admin.tenant_name = self.identity.admin_tenant_name
 
+        if parse_conf:
+            cfg.CONF.log_opt_values(LOG, std_logging.DEBUG)
+
 
 class TempestConfigProxy(object):
     _config = None