node tests: Remove unneeded set_global for pointer.
node tests: Remove unneeded set_global for pointer.

We eliminated the global pointer a while back.

In passing I move the remaining set_global calls
together.

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