test_fixtures: Fix buggy reuse of status_dir between databases.
test_fixtures: Fix buggy reuse of status_dir between databases.

Apparently, the arguments passed to template_database_status were
incorrect for the manual testing development database, in that we
didn't pass a status_dir when calling into that code from provision.

The result was that provisioning before running `test-backend` would
ignore changes to the list of check_files (etc.) made after rebasing,
and vice versa.

The cleanest fix is to compute status_dir from other values passed in;
I'm also going to open a follow-up issue for creating a better overall
interface here.

zulip/zulip,punchagan/zulip,punchagan/zulip,andersk/zulip,kou/zulip,brainwane/zulip,brainwane/zulip,shubhamdhama/zulip,rht/zulip,kou/zulip,timabbott/zulip,rht/zulip,eeshangarg/zulip,showell/zulip,andersk/zulip,andersk/zulip,hackerkid/zulip,punchagan/zulip,rht/zulip,synicalsyntax/zulip,brainwane/zulip,zulip/zulip,shubhamdhama/zulip,andersk/zulip,showell/zulip,eeshangarg/zulip,brainwane/zulip,timabbott/zulip,zulip/zulip,brainwane/zulip,synicalsyntax/zulip,showell/zulip,timabbott/zulip,rht/zulip,showell/zulip,andersk/zulip,punchagan/zulip,kou/zulip,showell/zulip,hackerkid/zulip,synicalsyntax/zulip,punchagan/zulip,kou/zulip,rht/zulip,zulip/zulip,shubhamdhama/zulip,synicalsyntax/zulip,timabbott/zulip,timabbott/zulip,eeshangarg/zulip,brainwane/zulip,zulip/zulip,eeshangarg/zulip,zulip/zulip,eeshangarg/zulip,shubhamdhama/zulip,showell/zulip,hackerkid/zulip,brainwane/zulip,punchagan/zulip,kou/zulip,hackerkid/zulip,hackerkid/zulip,andersk/zulip,synicalsyntax/zulip,showell/zulip,shubhamdhama/zulip,rht/zulip,eeshangarg/zulip,zulip/zulip,synicalsyntax/zulip,andersk/zulip,timabbott/zulip,shubhamdhama/zulip,synicalsyntax/zulip,kou/zulip,eeshangarg/zulip,punchagan/zulip,rht/zulip,hackerkid/zulip,shubhamdhama/zulip,hackerkid/zulip,timabbott/zulip,kou/zulip