CSI Volume tests should work with non-default kubelet root directories

[jonesbr17]

The CSI hostpath driver used in the e2e tests expects the root directory of nodes to be set to /var/lib/kubelet, hardcoded here, however nodes can be configured to use different paths. The tests should find out the root directory from kubelet to allow for this.

Version

Client Version: 4.3.3
Server Version: 4.4.6
Kubernetes Version: v1.17.1+f63db30

Steps To Reproduce

1. Configure kubelet on cluster nodes to use the non-default path.
2. Run the storage-csi e2e tests.

Current Result

Several test failures related to CSI Volumes:

[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (block volmode)(allowExpansion)] volume-expand [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (block volmode)(allowExpansion)] volume-expand Verify if offline PVC expansion works [Suite:openshift/conformance/parallel] [Suite:k8s]
[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (block volmode)(allowExpansion)] volume-expand [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (block volmode)(allowExpansion)] volume-expand should resize volume when PVC is edited while pod is using it [Suite:openshift/conformance/parallel] [Suite:k8s]
[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (block volmode)] volume-expand [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (block volmode)] volume-expand should not allow expansion of pvcs without AllowVolumeExpansion property [Suite:openshift/conformance/parallel] [Suite:k8s]
[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (block volmode)] volumeMode [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (block volmode)] volumeMode should not mount / map unused volumes in a pod [Suite:openshift/conformance/parallel] [Suite:k8s]
[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (block volmode)] volumes [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (block volmode)] volumes should store data [Suite:openshift/conformance/parallel] [Suite:k8s]
[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)(allowExpansion)] volume-expand [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)(allowExpansion)] volume-expand Verify if offline PVC expansion works [Suite:openshift/conformance/parallel] [Suite:k8s]
[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)(allowExpansion)] volume-expand [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)(allowExpansion)] volume-expand should resize volume when PVC is edited while pod is using it [Suite:openshift/conformance/parallel] [Suite:k8s]
[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)] provisioning [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)] provisioning should provision storage with pvc data source [Suite:openshift/conformance/parallel] [Suite:k8s]
[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)] provisioning [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)] provisioning should provision storage with snapshot data source [Feature:VolumeSnapshotDataSource] [Suite:openshift/conformance/parallel] [Suite:k8s]
[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)] subPath [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)] subPath should support existing directories when readOnly specified in the volumeSource [Suite:openshift/conformance/parallel] [Suite:k8s]
[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)] volumes [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic PV (default fs)] volumes should store data [Suite:openshift/conformance/parallel] [Suite:k8s]
[sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic Snapshot] snapshottable [Top Level] [sig-storage] CSI Volumes [Driver: csi-hostpath] [Testpattern: Dynamic Snapshot] snapshottable should create snapshot with defaults [Feature:VolumeSnapshotDataSource] [Suite:openshift/conformance/parallel] [Suite:k8s]

Expected Result

Tests are expected to pass.

Additional Information

[jonesbr17]

This is an upstream kubernetes issue, closing this out in favor of kubernetes/kubernetes#92664.