This change fixes a problem that made Horizon to crash when there are
more than one unprovisioned host, in the Host Inventory dashboard.
Closes-Bug: 2055721
Test Plan:
PASS: Deploy a Standard system and add multiple unprovisioned hosts.
Verify that the Host Inventory dashboard is displayed correctly.
Signed-off-by: Enzo Candotti <enzo.candotti@windriver.com>
Change-Id: I68bdcfbc9f699d4c1f807500f1826560fb0c1eb9