Fix to check if path for database and local_settings.py exists.
Fix to check if path for database and local_settings.py exists.

learningequality/ka-lite-installers,MCGallaspy/installers,ruimalheiro/installers,MCGallaspy/installers,learningequality/installers,benjaoming/installers,learningequality/ka-lite-installers,ruimalheiro/installers,benjaoming/installers,learningequality/installers,mrpau/installers,learningequality/ka-lite-installers,mrpau/installers,MCGallaspy/installers,ruimalheiro/installers,ruimalheiro/installers,learningequality/ka-lite-installers,benjaoming/installers,mrpau/installers,MCGallaspy/installers,learningequality/installers,benjaoming/installers,learningequality/installers,mrpau/installers