evolve: update the abort to a ProgrammingError
This error should be a ProgrammingError and as Pierre-Yves David said
ProgrammingError type did not existed when this code was written, so lets update
this now.
# 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