shadow-repos: use safer way to destroy shadow repositories....
shadow-repos: use safer way to destroy shadow repositories.
we had reported errors on removal of shadow repos. Not reproduced, however
suspecting are filesystem sync/symlink race-conditions on shared storage.
End result were existing shadow-repo directories that tricked rhodecode
into thinking shadow repos is existing, but infact it was a dummy
structure semi-removed. Using shutil.move we ENSURE rhodecode doesn't
read those back even if removal fails.
