Add oVirt Data Warehouse support

Add support for DWH to the oVirt plugin. Based on a patch for
sos-2.0 by Sandro Bonazzola. Fixes Issue #236.

Signed-off-by: Bryn M. Reeves <bmr@redhat.com>
Add reports support to oVirt plugin

Based on a patch for sos-2.0 by Sandro Bonazzola.

Fixes Issue #237.

Signed-off-by: Bryn M. Reeves <bmr@redhat.com>