Adds new hiera parameters for VIPs for all isolated networks including
any custom composable networks. The existing hard-coded network parameters
can be removed when the puppet-tripleo change
https://review.openstack.org/#/c/531037 merges that no longer uses them.
The new network_virtual_ips paramater contains the network name, vip, and
an index used to generate the vrouter_id in puppet-tripleo.
Change-Id: If8d3219a0714e3db34980e884dce84912a837865
Partial-Bug: 1741129
749a99a5cd