Always recreate acl files during dejagnu tests

The dejagnu tests create some persistent acl files containing
hostname-derived principal names.  These can get out of date if the
host has changed names since the last time the dejagnu tests were run,
causing failures (notably in iprop.exp).  To avoid this problem,
change the dejagnu tests to always create new acl files for each test
run.

https://github.com/krb5/krb5/commit/244bb3fde58dd6bab0969e0501b537c5871088f0
Author: Tom Yu <tlyu@mit.edu>
Commit: 244bb3fde58dd6bab0969e0501b537c5871088f0
Branch: master
 src/tests/dejagnu/config/default.exp       |   10 ++++------
 src/tests/dejagnu/krb-standalone/iprop.exp |    8 +++-----
 2 files changed, 7 insertions(+), 11 deletions(-)