phabricator: do more of the VCR work in demandimport.deactivated()
If I don't do this, VCR gets confused looking for pycurl and other
libraries. I have no idea how this ever worked.
Differential Revision: https://phab.mercurial-scm.org/D5159
tests: sleep longer in test-logtoprocess.t
We should probably write some sort of helper that can wait N seconds
for all specified values to appear in a file or something, but for now
this will fix the FreeBSD buildbot.
Differential Revision: https://phab.mercurial-scm.org/D5157