The proposal job to update the plugin list has been failing for a long
time as it gets a 500 error from gitea on the openstack/openstack
repo. This is an odd "superrepo" with all projects as submodules;
thus openstack/openstack/devstack is actually a project, not the
directory with a plugin in it.
Skip this repo (gitea shouldn't return a 500, but that's another
thing...)
Regenerate the list manually for this run.
Change-Id: I6ed65bcb720d4cb10702cbf66106120e001ec35f
afd346a0a1