Added a file to keep the db directory in the test rails_root
Added a file to keep the db directory in the test rails_root

pedrosmmoreira/clearance,naveed-ahmad/clearance,crowdtap/clearance,thoughtbot/clearance,sferik/clearance,janusnic/clearance,benlivermore/clearance,naveed-ahmad/clearance,crowdtap/clearance,zernie/clearance,janusnic/clearance,crowdtap/clearance,benlivermore/clearance,rubyist/clearance,janusnic/clearance,thoughtbot/clearance,zernie/clearance,pedrosmmoreira/clearance,thoughtbot/clearance,rubyist/clearance,openeducation/clearance,benlivermore/clearance,naveed-ahmad/clearance,zernie/clearance,pedrosmmoreira/clearance