prow.sh: also configure feature gates for kubelet

That this hasn't been done before is an oversight. Apparently it
hasn't been a problem because there never have been feature gates that
mattered?

fix incorrect link

Document the process for releasing a new sidecar

Update hostpath driver version to get fix for connection-timeout

Update snapshotter to version v2.0.0

Signed-off-by: Grant Griffiths <grant@portworx.com>

Fix overriding of junit results

Update prow hostpath driver version to 1.3.0-rc2

Fix version_gt to work with Kubernetes prefix

Signed-off-by: Grant Griffiths <grant@portworx.com>

Enable snapshot tests in 1.17 to be run in non-alpha jobs.

This requires adding one more parallel e2e test run with
a special focus flag because snapshot tests are still guarded
with a "[Feature:VolumeSnapshotDataSource]" tag. The setting that
skips all tests with "[Feature:.*]" has to be removed because it
overrides the focus.

We don't have serial snapshot tests yet. This needs to be modified
again if we add any in the future.

Improve README by adding an explicit Kubernetes dependency section

fix syntax for ppc64le build

Improve snapshot-controller running check and version_gt to support multiple formats 

Enable topology testing with hostpath driver

Signed-off-by: Grant Griffiths <grant@portworx.com>

Create a kind cluster with two worker nodes so that the topology feature can be tested. Test cases that test accessing volumes from multiple nodes need to be skipped

Use kind v0.6.0

kind v0.6.0 appends the kubeconfig with the default config at
~/.kube/config.

Adding build for ppc64le

Add snapshotter CRDs after cluster setup

Signed-off-by: Grant Griffiths <grant@portworx.com>

delete kind cluster after tests run

Inside a real Prow job it is better to clean up at runtime instead of leaving that to the Prow job cleanup code because the later sometimes times out.
Signed-off-by: Mucahit Kurt <mucahitkurt@gmail.com>

prow.sh: also log output of system containers

Depending on the error, those logs are needed to debug failures.

prow.sh: use vendor directory if available

This avoids dependencies on the Go module cache or the upstream code
hosting.

Go version 1.13, helper scripts