Insure removal of session on identity change
If we are changing identiy (different principal) insure we remove the
session cookie stored on the rpc context so that we do not mistakenly
connect with the previous identity credentials.
https://fedorahosted.org/freeipa/ticket/6543
Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-By: Jan Cholasta <jcholast@redhat.com>