Added relation between EventSchedule and program model

Program has many event_schedules through schedules

app/models/program.rb

@@ -10,6 +10,7 @@ class Program < ActiveRecord::Base
   has_many :tracks, dependent: :destroy
   has_many :difficulty_levels, dependent: :destroy
   has_many :schedules, dependent: :destroy
+  has_many :event_schedules, through: :schedules
   belongs_to :selected_schedule, class_name: 'Schedule'
   has_many :events, dependent: :destroy do
     def require_registration