Add options to push created Docker images to a repository, or keep them local on the node

[fourpastmidnight]

Currently, the script module builds any required docker images locally on the node being configured as a Windows cluster node, as well as updates the flannel-*.yml DaemonSet configuration file and the kube-proxy.yml DaemonSet configuration file.

Update the module to also accept a docker repository to which to push the images, and update the DaemonSet configuration files appropriately. Still maintain the option to build the images locally and keep them locally on the server (by configuring imagePullPolicy: never), as the module currently does.