add rootpw --lock to all livekickstarts

for rhbz#1392468 I was told that what we had should never have worked.
A bug in anaconda was fixed causing the need for the user or root
spokes to have to be dealt with. locking the root account should
satisfy everything.

Signed-off-by: Dennis Gilmore <dennis@ausil.us>

fedora-live-base.ks

@@ -19,6 +19,7 @@ clearpart --all
 part / --size 5120 --fstype ext4
 services --enabled=NetworkManager,ModemManager --disabled=sshd
 network --bootproto=dhcp --device=link --activate
+rootpw --lock --iscrypted locked
 shutdown
 
 %include fedora-repo.ks