Fudge kdumpctl to acknowledge "net" for SSH propagation

augeas can't set 'ssh' in kdumpctl yet, so we have to use net to
avoid using a template, but kdumpctl looks for 'ssh' explicitly

Work around it until augeas support goes to 7.0.z

Change-Id: I7b4a9f6a6086b96028d9f96c90f0a425dfcc805e
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1095140
Signed-off-by: Ryan Barry <rbarry@redhat.com>