VRFS-1445 display correct values of musician flag and country in admin

admin/app/admin/jam_ruby_users.rb

@@ -73,7 +73,7 @@ ActiveAdmin.register JamRuby::User, :as => 'Users' do
     column :admin
     column :updated_at
     column :created_at
-    column :musician
+    column :musician do |user| user.musician? ? true : false end
     column :city
     column :state
     column :country

admin/config/initializers/jam_ruby_user.rb

@@ -25,14 +25,6 @@
     end
   end
 
-  def country
-    @country = "United States"
-  end
-
-  def musician
-    @musician = true
-  end
-
   def confirm_url
     @signup_confirm_url ||= CONFIRM_URL
   end