test-app subscriptions are no longer delivering as expected

[DHaussermann]

test-app subscriptions are no longer delivering as expected. I have enabled at least 3 or 4 events and do not seem to be getting subscription deliveries.

Steps:

• Get latests master and build
• Upload latest Apps Plugin
• Start the test-app
• Install test app on the sere via http
• Enable subscriptions for user_joined_team, /test subscribe user_joined_channel and /test subscribe user_left_channel
  
• Add/remove a non-bot user form the team
• Invite a user to a channel

Observed No subscriptions are delivered
Expected 2/5 The event are posted in the DM with the test-app bot (I could be wrong on where they are delivered but, I don't see them anywhere)