* add user to PlayablePlay factor

ruby/spec/factories.rb

@@ -584,6 +584,7 @@ FactoryGirl.define do
   end
 
   factory :playable_play, :class => JamRuby::PlayablePlay do
+    association :user,           factory: :user
   end
 
   factory :recording_like, :class => JamRuby::RecordingLiker do