node fixtures: Add author_id key.
node fixtures: Add author_id key.

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