Delete empty keytab during client installation
Client installation fails if '/etc/krb5.keytab' exists as a zero-length
file. Deleting empty keytab before proceeding with the installation
fixes the problem.
https://pagure.io/freeipa/issue/7625
Signed-off-by: Armando Neto <abiagion@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>