Fixture helpers that commit to a repository the product later inspects now pass
maintenance.auto=false and gc.auto=0, as the product's own git calls already do,
so a detached git maintenance run no longer writes pack temp files mid-walk.
inspectGit now refuses a git metadata entry that vanishes between readdir and
lstat (or between listing a directory and reading it) with project-repository,
'git metadata changed during inspection', instead of leaking a raw ENOENT.
It still refuses rather than skipping or retrying. A missing .git keeps its
existing error.
A deterministic test removes the named entry from inside a replaced readdirSync,
for both a file and a directory.
jason.woltje
7e0d3c93f3