Skip test_session_storage in ipaclient unittest mode

The test class depends on a working Kerberos configuration and session.

Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>

ipatests/test_ipapython/test_session_storage.py

@@ -5,9 +5,12 @@
 """
 Test the `session_storage.py` module.
 """
+import pytest
+
 from ipapython import session_storage
 
 
+@pytest.mark.skip_ipaclient_unittest
 class test_session_storage(object):
     """
     Test the session storage interface