Make application UI visible in test mode
Make application UI visible in test mode

This changeset adds an entry to `ALLOWED_HOSTS` so that the application
UI can be viewed in test mode. My understanding is that test mode
disables Django's debug mode, which triggers `ALLOWED_HOSTS` filtering.

RickMohr/nyc-trees,RickMohr/nyc-trees,RickMohr/nyc-trees,maurizi/nyc-trees,kdeloach/nyc-trees,azavea/nyc-trees,kdeloach/nyc-trees,kdeloach/nyc-trees,maurizi/nyc-trees,maurizi/nyc-trees,azavea/nyc-trees,azavea/nyc-trees,azavea/nyc-trees,maurizi/nyc-trees,azavea/nyc-trees,kdeloach/nyc-trees,RickMohr/nyc-trees,kdeloach/nyc-trees