queue_processors: Make timer_expired receive list of events as argument.
queue_processors: Make timer_expired receive list of events as argument.

This will give queue workers more flexibility when defining their own
override of the method.

kou/zulip,zulip/zulip,kou/zulip,hackerkid/zulip,andersk/zulip,hackerkid/zulip,kou/zulip,hackerkid/zulip,andersk/zulip,hackerkid/zulip,zulip/zulip,rht/zulip,eeshangarg/zulip,andersk/zulip,eeshangarg/zulip,punchagan/zulip,rht/zulip,eeshangarg/zulip,punchagan/zulip,kou/zulip,kou/zulip,rht/zulip,zulip/zulip,punchagan/zulip,punchagan/zulip,andersk/zulip,andersk/zulip,andersk/zulip,eeshangarg/zulip,zulip/zulip,kou/zulip,zulip/zulip,punchagan/zulip,rht/zulip,rht/zulip,eeshangarg/zulip,eeshangarg/zulip,hackerkid/zulip,zulip/zulip,eeshangarg/zulip,rht/zulip,andersk/zulip,kou/zulip,punchagan/zulip,hackerkid/zulip,hackerkid/zulip,zulip/zulip,punchagan/zulip,rht/zulip