3.16: only remove soft-deletes from account dbs, and don't refresh the
db if the view is missing
KAZOO-2767: ensure sync_interface succeeds, retry until it does

Conflicts:
	applications/ecallmgr/src/ecallmgr_fs_node.erl
Merge remote-tracking branch 'upstream/3.12' into 3.12
KAZOO-2873: Set hangup_after_bridge to true