new method emptydb
use emptydb instead of flushdb, flushdb removes indices for mongo which
breaks search tests
initialize meta.config properly in tests
enable nodebb-plugin-dbsearch for tests
use batch.processArray in notifications.push and moveRecentReplies
added notification tests
added test for moveRecentReplies
clear group cache if a group is deleted
Peter Jaszkowiak
barisusakli
HeeL