Replace registry-creds addon ReplicationController with Deployment

Performance and security enhancement for ingress-dns addon

jenkins: rsync needs -R, add version output

Disable go modules for containerd, for newer go

Upgrade Buildroot to 2019.02 and VirtualBox to 5.2

gsutil: Remove trailing slashes, rsync instead of cp

New major version of Buildroot, with new Linux kernel.
Both are LTS versions, and are supported until 2020.

Buildroot is upgraded from 2018.05 to 2019.02 LTS,
and Linux from 4.15 to 4.19 LTS as included in BR2.

Also upgrade VirtualBox to the supported 5.2 version
of the older branch, so that it will work everywhere.

Need to remove the legacy symlink for crio.sock from
the image, since it was causing build time issues...

It worked for go1.10, but not really for go1.11

Update Makefile for version 1.4.1

Update default Kubernetes version to 1.16.1

Bump golangci-lint to v1.20.0

Warn when a user tries to set a profile name that is unlikely to be valid

Remove unused enableUpdateNotification variable

Disable interfacer lint check

jenkins: Resilient VirtualBox VM and test directory cleanup

As the official k8s docs state:

> Note: A Deployment that configures a ReplicaSet is now the recommended way to set up replication.

https://kubernetes.io/docs/concepts/workloads/controllers/replicationcontroller/

Add ability to enable addon through  'minikube start' flag

Add documentation for adding translations