[j-nsp] root-login via ssh and 11.x

[Nick Kritsky]

FYI: It looks like in version 11 Juniper has changed default settings
for "system services ssh root-login".
Now if you want to login as root via ssh, you have to explicitly allow
it. in 10.X it was allowed by default.
Tested on EX-4200, SRX-100.

Funny thing is that documentation is still claiming that default
setting is to allow:
http://www.juniper.net/techpubs/en_US/junos11.4/topics/reference/configuration-statement/root-login-edit-system.html
I don't have any device with 12.1 to test, but I suspect that the
problem exists there as well.

If anyone from J is reading - please update documentation or JunOS
defaults. It would be nice to keep them in sync.

thanks
Nick