Add ondelete cascade to foreign key constraint
Add ondelete cascade to foreign key constraint

Otherwise the delete() command in process.py fails (the one removing
accidents with no location).
We want to delete all associated involved and vehicle data when deleting
an accident.

esegal/anyway,hasadna/anyway,yosinv/anyway,esegal/anyway,yosinv/anyway,omerxx/anyway,omerxx/anyway,hasadna/anyway,yosinv/anyway,OmerSchechter/anyway,boazin/anyway,hasadna/anyway,HamutalCohen3/anyway,boazin/anyway,omerxx/anyway,OmerSchechter/anyway,boazin/anyway,OmerSchechter/anyway,hasadna/anyway,HamutalCohen3/anyway,HamutalCohen3/anyway,esegal/anyway