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>
It's good that you're now using IOException, but we would like to report _exception.message to the user instead of our own message, because it has more specific information in.