Fix shellcheck in hack/lib/golang.sh

[e2e] Remove unused function and clean up redundant code

Fix shellcheck failures of hack/test-update-storage-objects.sh

Beta upgrade for feature gate VolumeSubpathEnvExpansion

Fix shellcheck failures of hack/verify-description.sh and hack/verify-import-boss.sh

Fix shellcheck failures on test-e2e-node.sh and test-integration.sh

fix detach azure disk back off issue which has too big lock in failure retry condition

Add IPv6 support to the Container Lifecycle tests

CSI - Skips deviceMounter.MountDevice for ephemeral volumes

Request network plugin in bug report template

Remove ineffectual assignment

add apimachinery api-reviewers

Fix shellcheck failures of hack/update-generated-runtime-dockerized.sh

Create the "internal" firewall rule for kubemark master.

Move "-s -w" flags to GOLDFLAGS as an overridable default.

Update klog to 0.3.0

[e2e] Refactor of e2e/framework/authorizer_util.go

Fix potential test flakes in HPA tests TestEventNotCreated and TestAvoidUncessaryUpdates

Fix typo, old link for contributors

Signed-off-by: Vince Prignano <vincepri@vmware.com>

This is equivalent to the "internal" firewall rule that is created for
the regular masters.
The main reason for doing it is to allow prometheus scraping metrics
from various kubemark master components, e.g. kubelet.

Ref. https://github.com/kubernetes/perf-tests/issues/503

Expect directory permissions to be 0700

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

update the permissions to 0660
Signed-off-by: PingWang <wang.ping5@zte.com.cn>

revert to 0750
Signed-off-by: PingWang <wang.ping5@zte.com.cn>

update 0750 to 0700
Signed-off-by: PingWang <wang.ping5@zte.com.cn>

Using const() defines constants together

Add operation name for other volume operations

Use constant blocks to define constants in pkg/kubectl

Remove deprecated centos/local support

Fix Azure SLB support for multiple backend pools

Pin GCE Windows node image to 1809 v20190312.

Fix a log info error

Azure VM and vmssVM support multiple backend pools for the same SLB, but
not for different LBs.

If GOLDFLAGS is set, whether it is empty or not, we should honor it.
Only if the GOLDFLAGS is totally not set, then we use "-s -w"

See Parameter Expansion section in the urls below:

https://stackoverflow.com/questions/3601515/how-to-check-if-a-variable-is-set-in-bash/16753536
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_02

Change-Id: I826c34efc63c77f0e3e9677fff30a3eb2219a377