actions: Use transaction.atomic for do_change_default_events_register_stream.
actions: Use transaction.atomic for do_change_default_events_register_stream.

kou/zulip,zulip/zulip,rht/zulip,andersk/zulip,zulip/zulip,kou/zulip,zulip/zulip,zulip/zulip,andersk/zulip,kou/zulip,zulip/zulip,andersk/zulip,zulip/zulip,rht/zulip,rht/zulip,rht/zulip,zulip/zulip,rht/zulip,andersk/zulip,rht/zulip,kou/zulip,kou/zulip,rht/zulip,andersk/zulip,andersk/zulip,kou/zulip,kou/zulip,andersk/zulip