p2v: Set root password of virt-p2v ISO to 'p2v'.

It is documented as 'p2v', but in fact this was not implemented
so there is no way to log in as root on the console.

On RHEL we also have to add the 'passwd' package, else you get:

  Error creating Live CD : Unable to set unencrypted password due to lack of /usr/bin/passwd

p2v/p2v.ks.in

@@ -21,6 +21,8 @@ lang en_US.UTF-8
 keyboard us
 timezone --utc GMT
 
+rootpw --plaintext p2v
+
 selinux --enforcing
 firewall --enabled
 
@@ -51,6 +53,9 @@ rpm
 # Note you must have a kernel, else the boot menu won't work:
 kernel
 
+# This is required in order for RHEL to set the root password.
+passwd
+
 # Required to run firewall --enabled kickstart command:
 firewalld