Introduce $nuage_log that logs into log/nuage.log

With this commit we introduce yet another global logger
that is to be used by nuage provider. We're having quite
some logs there and it's better to log them into its own
file.

Signed-off-by: Miha Pleško <miha.plesko@xlab.si>

.rubocop_local.yml

@@ -25,6 +25,7 @@ GlobalVars:
   - $vcloud_log
   - $vim_log
   - $websocket_log
+  - $nuage_log
 Rails/Exit:
   Exclude:
   - lib/workers/bin/*

config/settings.yml

@@ -881,6 +881,7 @@
   :level_vim: warn
   :level_websocket: info
   :level_vcloud: info
+  :level_nuage: info
 :ntp:
   :server:
   - 0.pool.ntp.org

lib/vmdb/loggers.rb

@@ -99,6 +99,7 @@ def self.apply_config(config)
       apply_config_value(config, $lenovo_log,        :level_lenovo)
       apply_config_value(config, $websocket_log,     :level_websocket)
       apply_config_value(config, $vcloud_log,        :level_vcloud)
+      apply_config_value(config, $nuage_log,         :level_nuage)
     end
 
     def self.create_loggers
@@ -124,6 +125,7 @@ def self.create_loggers
       $websocket_log     = create_multicast_logger(path_dir.join("websocket.log"))
       $miq_ae_logger     = create_multicast_logger(path_dir.join("automation.log"))
       $vcloud_log        = create_multicast_logger(path_dir.join("vcloud.log"))
+      $nuage_log         = create_multicast_logger(path_dir.join("nuage.log"))
 
       configure_external_loggers
     end