Add max_reservations_per_user column to resources table

Added db migration to add max_reservations_per_user column to resources table.

db/migrate/20190208084000_add_max_reservations_per_user.rb

+require 'active_record'
+
+class AddMaxReservationsPerUser < ActiveRecord::Migration
+	def change
+		add_column :resources, :max_reservations_per_user, :integer, limit: 3, unsigned: true
+	end
+end
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