tests: add coverage for some untested areas of hgweb The fact that these mimetype guesses weren't blowing up anywhere on py3 prior to 9310037f0636 was the giveaway. The annotate function is a bit unusual in that it renders the page with a 500 in the middle, so I left the HTML output. For the other functions, checking the access log is enough.

statprof: update the name as the i increases (issue6003) 2864f8d3fcd6 while working on py3 fix, take out the name building out of the loop so we were not building the new stack-name for each i, rather we were using the first one again and again. The test changes shows the profile is now working. Differential Revision: https://phab.mercurial-scm.org/D5172

test: show more profile lines in test-profile.t This shows that we don't output anything after the first line and demonstrate issue6003. Differential Revision: https://phab.mercurial-scm.org/D5171

keepalive: use getattr to avoid AttributeErrors when vcr is in use Fixes test-phabricator.t. Differential Revision: https://phab.mercurial-scm.org/D5160

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

tests: fix pyflakes warning in test-duplicateoptions.py Differential Revision: https://phab.mercurial-scm.org/D5158

branchmap: avoid changelog and attribute lookups in replacecache() This should make things faster. I'm not sure which operations would benefit from it though. Maybe branchmap application on clone? Differential Revision: https://phab.mercurial-scm.org/D5162