Revert "userportal : Fix DiskForVmGuid high CPU"

This reverts commit 92c205f3a6184572889726284fcd475c6e6d4be8.

Breaks DAO tests.

Change-Id: If7af9a11027b8cf48d85c1bc6cf3753ae5be77c4
Signed-off-by: Daniel Erez <derez@redhat.com>