Description of problem:
Networks in a distributed switch take a long time to load when there is alot

Version-Release number of selected component (if applicable):

6.3.1
tfm-rubygem-fog-vsphere-1.7.0-1.el7sat.noarch
foreman 1.15

How reproducible:

Steps to Reproduce:
1. Install sat 6 and connect to VMware compute resource
2. Create a lot of port groups in the distributed switch
3. Watch it take forever

Actual results:

It took more than an hour/2 in the DC with 1000+ networks.
The DC with 400 networks took maybe 20 minutes.
Another one with 21 networks was almost immediate, but one with 35 networks which is over in Singapore took about 10 minutes.

Expected results:
Much faster time to load the interfaces tab then the timing above

Additional info:

Upstream issue filed here:

https://github.com/fog/fog-vsphere/issues/144