Add test for kinit -C WRONG_REALM response

(cherry picked from commit c0778ab2252ece4c3510788d9b72f7f5e3bb05dd)

https://github.com/krb5/krb5/commit/8b61c2c06b61ede1134f4623ec558ea2a0b3901a
Author: Greg Hudson <ghudson@mit.edu>
Committer: Tom Yu <tlyu@mit.edu>
Commit: 8b61c2c06b61ede1134f4623ec558ea2a0b3901a
Branch: krb5-1.12
 src/tests/t_general.py |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)