Send "scheduled" notification even when video conference creation fails

[tedyoung]

Right now, if the EnsembleService gets a FailedToScheduleMeeting exception, it never sends notifications that the Ensemble was scheduled. Even if the video conference is created later (via the changeTo), no notification is sent.

• [x] 1. send notification regardless of whether the Zoom is created or not.
• [ ] 2. send notification about change in information for those who Accepted (so they get the right Zoom link)