Improve logging

This is a followup patch to [1] addressing minor
fixes and improvements in the area of logging.

1. https://review.openstack.org/#/c/488874

Change-Id: I6c703b35c32644d8769a863fbe7940a002a185f0

virtualbmc/cmd/vbmc.py

@@ -98,10 +98,11 @@ class ZmqClient(object):
 
                 no_daemon = True
 
-                LOG.debug("Attempting to start vBMC daemon behind the "
-                          "scenes...")
-                LOG.debug("Please, configure your system to manage vbmcd "
-                          "by systemd!")
+                LOG.debug("Attempting to start `vbmcd` behind the "
+                          "scenes. Consider configuring your system to "
+                          "manage `vbmcd` via systemd. Automatic "
+                          "`vbmcd` start up will be removed in the "
+                          "future releases!")
 
                 # attempt to start and daemonize the server
                 if os.fork() == 0:

virtualbmc/cmd/vbmcd.py

@@ -70,7 +70,7 @@ def main(argv=sys.argv[1:]):
             func()
 
         except Exception as e:
-            LOG.error('%(error)s. ', {'error': e})
+            LOG.error('%(error)s', {'error': e})
             return 1
 
         finally:

virtualbmc/manager.py

@@ -196,7 +196,7 @@ class VirtualBMCManager(object):
 
             if instance and not instance.is_alive():
                 del self._running_domains[domain_name]
-                LOG.info(
+                LOG.debug(
                     'Reaped vBMC instance for domain %(domain)s '
                     '(rc %(rc)s)' % {'domain': domain_name,
                                      'rc': instance.exitcode}