Adding a new `WindowsSecurityOptions` struct

use static token to authenticate glbc

ingress: use networking api group for default storage of ingress

tests: Splits hostname from DNS test

Remove unnecessary custom conversion functions

Collapse integration test storage setup onto actual storage config

Pick up security patches for fluentd-gcp-scaler by upgrading to version 0.5.2

kubeadm: do unit testing of actual public function

Fix golint failures of pkg/controller/certificates/approver, etc

Fix golint failures of test/e2e/lifecycle

PodSecurityPolicy RuntimeClass support

Even though CreateServiceAccountKeyAndPublicKeyFiles() function is
an interface function it's not unittested. Instead it wraps a couple
of internal functions which are used only inside CreateServiceAccountKeyAndPublicKeyFiles()
and those internal functions are tested.

Rewrite the function to do only what it's intended to do and add unit
tests for it.

Clean up genswaggertypedocs.

Query pod status outside loop over containers

Add meta/v1 Table and PartialObjectMetadata objects

Use read lock for ServiceHasEndpoints

kubelet/cm: code optimization for the static policy

Update some OWNERS files

Fix a bug in the gpu device plugin 

Fix block volume expansion

Fix some golint failures of pkg/kubectl/cmd/attach pkg/kubectl/cmd/autoscale

Use read lock for QuotaMonitor#IsSynced

Use read lock in ServeHTTP

Clean up kubeadm.

Add ability to find init Container IDs in cpumanager reconcileState()

Rebase etcd-empty-dir-cleanup to debian-base

Move MountsInGlobalPDPath from mount pkg to volume

Fixed a `make clean` regression

Link to CNCF artwork repo

These are based on recommendation from
[staticcheck](http://staticcheck.io/).

- Remove unused struct fields
- Remove unused function
- Remove unused variables
- Remove unused constants.
- Miscellaneous cleanups