Add long timeout for sqlite connection for content import to reduce risk of database locked errors.
Add long timeout for sqlite connection for content import to reduce risk
of database locked errors.

indirectlylit/kolibri,lyw07/kolibri,lyw07/kolibri,mrpau/kolibri,learningequality/kolibri,mrpau/kolibri,mrpau/kolibri,learningequality/kolibri,indirectlylit/kolibri,indirectlylit/kolibri,mrpau/kolibri,learningequality/kolibri,learningequality/kolibri,indirectlylit/kolibri,lyw07/kolibri,lyw07/kolibri