add sentry capture to v3 router

lib/travis/api/v3/router.rb

@@ -3,6 +3,10 @@ module Travis::API::V3
     include Travis::API::V3
     attr_accessor :routes, :metrics_processor
 
+    Raven.configure do |config|
+      config.dsn = Travis.config.sentry.dsn
+    end
+
     def initialize(routes = Routes)
       @routes            = routes
       @metrics_processor = Metrics::Processor.new
@@ -12,6 +16,10 @@ module Travis::API::V3
     end
 
     def call(env)
+      Raven.capture do
+        # capture any exceptions which happen during execution of this block
+        1 / 0
+
         return service_index(env) if env['PATH_INFO'.freeze] == ?/.freeze
         metrics         = @metrics_processor.create
         access_control  = AccessControl.new(env)
@@ -46,6 +54,7 @@ module Travis::API::V3
 
         response
       end
+    end
 
     def render(result, env_params, env)
       V3.response(result.render(env_params, env), status: result.status)