Description of problem:
Trend charts are empty when looking at “All projects”, the issue does not happen when looking at a specific project which has VMs running

Version-Release number of selected component (if applicable):
v4.1.2.0

How reproducible:
100%

Steps to Reproduce:
1. Visit Virtualization -> Overview
2.
3.

Actual results:
Trend charts are empty

Expected results:
There are data loaded in “All projects” if the cluster has VMs running

Additional info: