[api] Make RabbitMQ message bus queues to be co...

...nfigurable (Thanks git-cop).

We have plenty of users and customers that host their own OBS instance.
This change allows them to distunguish RabbitMQ messages from different
hosts by adding a custom prefix.

src/api/app/models/configuration.rb

@@ -75,6 +75,10 @@ def ldap_enabled?
     CONFIG['ldap_mode'] == :on
   end
 
+  def amqp_namespace
+    CONFIG['amqp_namespace'] || 'opensuse.obs'
+  end
+
   def passwords_changable?
     change_password && CONFIG['proxy_auth_mode'] != :on && CONFIG['ldap_mode'] != :on
   end

src/api/app/models/event/comment.rb

@@ -35,7 +35,7 @@ class Event::CommentForProject < ::Event::Project
   after_commit :send_to_bus
 
   def self.message_bus_queue
-    'opensuse.obs.project.comment'
+    "#{Configuration.amqp_namespace}.project.comment"
   end
 
   self.description = 'New comment for project created'
@@ -51,7 +51,7 @@ class Event::CommentForPackage < ::Event::Package
   after_commit :send_to_bus
 
   def self.message_bus_queue
-    'opensuse.obs.package.comment'
+    "#{Configuration.amqp_namespace}.package.comment"
   end
 
   self.description = 'New comment for package created'

src/api/config/options.yml.example

@@ -162,6 +162,9 @@ backup_port: 22
 
 # Rabbitmq based message bus
 #
+# Prefix of the message bus rooting key
+# amqp_namespace: 'opensuse.obs'
+#
 # Connection options -> http://rubybunny.info/articles/connecting.html
 # amqp_options:
 #   host: rabbit.example.com