Deleting precompiled assets:
Handling incorrect property_id in twillio call

If a caller enteres an incorrect property id, we should handle it gracefull.
Prior to this commit, it resulted in an application error.

An RSPEC assertion as added to test basic functionality.
If the Property found by id return nil, we play a message and loop them back
into gathering the id.
After a certain count of incorrect id attempts, we escape through a goodbye message.
:1