test: simpler requirement matching in test-revlog-v2.t
We narrow the matching toward the one we actually care about.
Differential Revision: https://phab.mercurial-scm.org/D11987
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"phabricator.uri": "https://phab.mercurial-scm.org/",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}