Thanks to Felipe Contreras for the patch which this was based on.
Even though the MQ extension was only used in a single test
(test-pull-after-strip.t), I included it in the testutil. It shouldn't hurt
anything to have it enabled and not used, and saves us from having to deal
with enabling extensions in individual tests at all.
Similarly, this changeset results in the graphlog extension being enabled
for all tests, even though there were some that didn't use it before. This is
even less significant in Mercurial 2.3+, since in those versions, graphlog is
part of core, and is available even when the extension is disabled.
Dulwich now supports local repositories just fine. Not using the daemon makes
the tests easier to read and more reliable (less likely to be skipped because
a stray daemon is holding onto the port).
In many cases we were piping to a python script to strip out the varying leading
path to the test repos. This is no longer needed, as the modern run-test.py
automatically substitutes the leading path as $TESTTMP. Eliminating the piping
makes the tests easier to read and write, as well as allowing the exit codes
to be verified by the test.
