Description of problem:
Once an IPA users' kerberos ticket expires, the expired credential is left in
/tmp, and causes the users' home directory to fail to automount on next login
(via ssh in this case). This also causes ssh to hang up during the connection.

Version-Release number of selected component (if applicable):
autofs-5.0.5-54.el6.x86_64
ipa-client-2.2.0-16.el6.x86_64
ipa-python-2.2.0-16.el6.x86_64
libipa_hbac-1.8.0-32.el6.x86_64
libipa_hbac-python-1.8.0-32.el6.x86_64
python-iniparse-0.3.1-2.1.el6.noarch

How reproducible:
Always, in the customers environment.

Steps to Reproduce:
1. Setup automounts for home directories via IPA webui
2. Login with one of the IPA users
3. Allow home directory to mount
4. Logout
5. Wait for kerberos ticket to expire
6. Attempt to log back in with the same user

Actual results:
Automount fails to mount, ssh hangs

Expected results:
Automount should mount, ssh should not hang

Additional info:
Attaching strace of a successful and unsuccessful test.