alert_word tests: Use hamlet for all tests.
alert_word tests: Use hamlet for all tests.

The tests had a bunch of different ways to create
users; now we are consistent.  (This is a bit of
a prep step, too, to allow us to easily clean
Hamlet's existing words before each test.)

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