Fix shellcheck lint errors in test/images/* scripts

Removes test-only skipTabWriter from HumanReadablePrinter

Replace false with "exit 1" under hack/

Add SIG Scheduling API reviewers to OWNERS_ALIASES

Use consistent imageRef during container startup

proxy/userspace: add dcbw and danwinship to OWNERS approvers

proxy/userspace: respect minSyncInterval

Updates OWNERS files and OWNERS_ALIASES for SIG Apps 

Update winkernel owners file

Small bug: Comments and function names do not match

Remove unused lock in scheduler

Limit the read length of ioutil.ReadAll in `pkg/credentialprovider` 

[kubeadm] clean up command description information for consistency and readability

Output missing cert or key name in DownloadCerts

[e2e] decouple the aggregated clientset from the e2e testing framework

Use IP addresses to test external connectivity

Remove and replace ptr functions

Some scripts contained `false` for returning 1 to callers instead of
`exit 1` and that works like:

  $ false
  $ echo $?
  1
  $

But that made confusion in a PR review process.
So this replaces `false` with `exit 1` for long-term maintenance.

Signed-off-by: Haiyan Meng <haiyanmeng@google.com>

add heartbeat inside watch

clean up unused code in scheduler

and approvers more clear

Delete unused struct, nodeEnumerator

remove unused functions & types in test/e2e/framework/util.go

Fix golint failures of pkg/apis/core/helper

Fix shellcheck failures of hack/update-openapi-spec.sh

Remove empty metrics.go file and method call

Otherwise the user does not know what key `kubeadm` is expecting, which makes troubleshooting harder

Remove usage of the aggregated clientset in the e2e testing framework
itself. We have one test that consumes the clientset in the suite
and it's in test/e2e/apimachinery/aggregator.go, which was recently
promoted to conformance in 8101b86a.

This test now obtains a local copy of the aggregated clientset.
The suite still has to compile the internal client in.
One possible solution here is to move this test in a separate suite,
yet it's unclear of how to tackle the problem now that the test
has to run as part of the conformance suite.

Signed-off-by: PingWang <wang.ping5@zte.com.cn>

Add missing node.address != "" condition in tests

clean the deprecated func Parallelize

Promote container runtime e2e verifying termination message 

Enable StorageObjectInUseProtection by default