CP-9370:Add network type and more error message for resource list report feature

Add network type column to network table
Add memory usage ratio to VM and Host tables
Add detail error message in exporting report

Signed-off-by: Cheng Zhang <cheng.zhang@citrix.com>
We don't have a network type for the built-in networks (use PIF.IsPhysical), or for Single-Server Private Networks (has no PIFs).