Fix bug with interactive report and SLA failures
Fix bug with interactive report and SLA failures

This commit is to fix a bug where a test will fail due to the SLA not
being met but the interactive html report shows 'success'. This fixes
interactive html report to show 'sla fail'.

Change-Id: Ief30bf5125013805e3aef75f74a892e71c41ea6e
Closes-Bug: 1801972

openstack/shaker,openstack/shaker,stackforge/shaker,openstack/shaker,stackforge/shaker