Make DB connections persistent
Make DB connections persistent

aapris/linkedevents,City-of-Helsinki/linkedevents,aapris/linkedevents,tuomas777/linkedevents,tuomas777/linkedevents,kooditiimi/linkedevents,kooditiimi/linkedevents,aapris/linkedevents,kooditiimi/linkedevents,kooditiimi/linkedevents,City-of-Helsinki/linkedevents,tuomas777/linkedevents,City-of-Helsinki/linkedevents