Add test for kinit output ccache error

(back ported from commit e47d8204843ce87fcc1342c7970dded8536fcbde)

https://github.com/krb5/krb5/commit/26f2bf480f5144684fe2b628e52b3ee9c96ecb9e
Author: Tom Yu <tlyu@mit.edu>
Commit: 26f2bf480f5144684fe2b628e52b3ee9c96ecb9e
Branch: krb5-1.13
 src/tests/t_ccache.py |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)