Fix running the test suite through manage.sh
Fix running the test suite through manage.sh

Apparently the DiscoverRunner needs to be run from the project directory.

Since the Django docs generally show manage.py being used from the
directory it is in, I just changed manage.sh to always run from /opt/app

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