test-acl: glob the payload size again
This size of bundle-2 payload are irrelevant for this test and only appears in
its output because other pieces of the debug output are important.
We glob it these number before they get in our way again.
#
# Avoid interference from actual test env:
unset HGTEST_JOBS
unset HGTEST_TIMEOUT
unset HGTEST_PORT
unset HGTEST_SHELL