Autocorrect new rubocop offenses

db/migrate/20140730104658_migrate_roles_for_cancancan.rb

@@ -8,7 +8,7 @@ class MigrateRolesForCancancan < ActiveRecord::Migration
     Role.all.each do |role|
       role.users.each do |user|
         Conference.all.each do |conference|
-          if role.name == 'Admin' || role.name == 'Organizer'
+          if ['Admin', 'Organizer'].include?(role.name)
             user.add_role :organizer, conference
             user.update_columns(is_admin: true)
           else

db/migrate/20170531094819_move_conferences_to_organizations.rb

@@ -13,7 +13,7 @@ class MoveConferencesToOrganizations < ActiveRecord::Migration
     add_reference :conferences, :organization, index: true
 
     TempConference.reset_column_information
-    if TempConference.count != 0
+    if TempConference.any?
       organization = TempOrganization.create(name: 'organization', description: 'Default organization')
       TempConference.all.each do |conference|
         conference.organization_id = organization.id