Add test for KDC client logging

Add a test case which performed a TGS request with an expired ticket
and checks that the client principal is logged.

https://github.com/krb5/krb5/commit/4799121941cfd846f9d3d7a905ac4c84342ff306
Author: Greg Hudson <ghudson@mit.edu>
Commit: 4799121941cfd846f9d3d7a905ac4c84342ff306
Branch: master
 src/tests/Makefile.in  |    1 +
 src/tests/t_kdc_log.py |   23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+), 0 deletions(-)