Wait volumeAttachments deletion before deleting nodes #1189
Description
When using vSphere as a cloud provider with the external CSI driver, the node rollout leads to the following problem: the CSI driver doesn't have enough time to delete the existing volumeAttachments related to the old node before it is deleted; they hang forever and are not collected anymore by the CSI driver because the old node doesn't exist anymore. To solve this issue, the machine controller should wait for the existing volumeAttachments deletion before deleting the node.