obslog: pass directly unfiltered_repo
_debugobshistorydisplaynode used to create two times an unfiltered repo, makes
_debugobshistoryrevs create only one unfiltered repo and pass it directly.
# utility to setup pythonpath to point into the tested repository
export SRCDIR=`dirname $TESTDIR`
if [ -n "$PYTHONPATH" ]; then
export HGTEST_ORIG_PYTHONPATH=$PYTHONPATH
export PYTHONPATH=$SRCDIR:$PYTHONPATH
else
export PYTHONPATH=$SRCDIR
fi