add missing schema entry and application settigns helper

app/helpers/application_settings_helper.rb

@@ -211,6 +211,7 @@ module ApplicationSettingsHelper
       :polling_interval_multiplier,
       :project_export_enabled,
       :prometheus_metrics_enabled,
+      :prometheus_metrics_method_instrumentation_enabled,
       :recaptcha_enabled,
       :recaptcha_private_key,
       :recaptcha_site_key,

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
-ActiveRecord::Schema.define(version: 20171121144800) do
+ActiveRecord::Schema.define(version: 20171122211913) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -149,6 +149,7 @@ ActiveRecord::Schema.define(version: 20171121144800) do
     t.boolean "throttle_authenticated_web_enabled", default: false, null: false
     t.integer "throttle_authenticated_web_requests_per_period", default: 7200, null: false
     t.integer "throttle_authenticated_web_period_in_seconds", default: 3600, null: false
+    t.boolean "prometheus_metrics_method_instrumentation_enabled", default: false, null: false
   end
   create_table "audit_events", force: :cascade do |t|