tests/helper-runtests.sh

scmutil: make function name bytes in class filecache

func.__name__ returns unicodes and this leads to keyerror when we try
to do filecache[''] by passing bytes.

#
# Avoid interference from actual test env:

unset HGTEST_JOBS
unset HGTEST_TIMEOUT
unset HGTEST_PORT
unset HGTEST_SHELL