node tests: Reuse message_list stubs.
node tests: Reuse message_list stubs.

We now just override these functions to close
on local variables.

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