Added ::ntp to rjil

Added include ::ntp class to rjil::system.
Added appropriate parameters in hiera data.

Notes
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Added clientcert level override for lb1 assuming that lb1 is ntp server
to other nodes in the cloud.

ntp::ntpserver on common.yaml may be moved to environment specific override,
as the ntp server can be different for different environment.
I'm pretty hesitant to check in any hardcoded ip addresses into the common.yaml file. Maybe you need a config file for your specialized environment with hard-coded ip addresses.

Also, given that we are not automatically configuring the load balancer role as an ntp server, what is the point of this code?