Simplify Librato setup.

Moves monitoring related setup to its own method.

lib/travis/api/app.rb

@@ -158,18 +158,7 @@ module Travis::Api
         end
 
         if Travis.env == 'production' and not console?
-          Raven.configure do |config|
+          setup_monitoring
-            config.dsn = Travis.config.sentry.dsn
-          end if Travis.config.sentry
-
-          Travis::LogSubscriber::ActiveRecordMetrics.attach
-          Travis::Notification.setup(instrumentation: false)
-
-          if Travis.config.librato
-            email, token, source, prefix = Travis.config.librato.email, Travis.config.librato.token, Travis.config.librato_source, Travis.config.librato_prefix
-            $metriks_reporter = Metriks::LibratoMetricsReporter.new(email, token, source: source, prefix: prefix)
-            $metriks_reporter.start
-          end
         end
       end
 
@@ -182,6 +171,23 @@ module Travis::Api
         end
       end
 
+      def self.setup_monitoring
+        Raven.configure do |config|
+          config.dsn = Travis.config.sentry.dsn
+        end if Travis.config.sentry
+
+        Travis::LogSubscriber::ActiveRecordMetrics.attach
+        Travis::Notification.setup(instrumentation: false)
+
+        if Travis.config.librato
+          email, token, source, prefix = Travis.config.librato.email,
+                                         Travis.config.librato.token,
+                                         Travis.config.librato_source,
+                                         Travis.config.librato_prefix
+          Metriks::LibratoMetricsReporter.new(email, token, source: source, prefix: prefix).start
+        end
+      end
+
       def self.load_endpoints
         Backports.require_relative_dir 'app/middleware'
         Backports.require_relative_dir 'app/endpoint'