CA-109242: When a network has no PIF on a host, don't list it in that host's networking tab

Signed-off-by: Mihaela Stoica <mihaela.stoica@citrix.com>
Merge pull request #62 from MihaelaStoica/CA-109242

CA-109242: When a network has no PIF on a host, don't list it in that ho...