make nfs server multi network aware

* properties.nfs_server uses definition from meta: section
* rename debian_nfs_server.no_root_squash to nfs_server.no_root_squash for consistency
* nfs_server.network becomes .allow_from_entries to support multi-network deployments with NFS
* * NFS exports file will have an entry for each .allow_from_entries element
* * cf-jobs.yml is updated to reflect the new property
* fix pr 476 and merge

[#76095934]

Signed-off-by: Michael Fraenkel <fraenkel@us.ibm.com>