Minor fix where VHDs were not deleting while background cleanup.
Minor fix where VHDs were not deleting while background cleanup.

iamshital/azure-linux-automation,v-sirebb/azure-linux-automation,konkasoftci/azure-linux-automation,v-sirebb/azure-linux-automation,konkasoftci/azure-linux-automation,iamshital/azure-linux-automation,konkasoftci/azure-linux-automation,v-sirebb/azure-linux-automation,iamshital/azure-linux-automation