The fields for ExtraEnv, extraVolumes and extraVolumeMounts for ingress
addon refer the k8s native types EnvVar, Volume and VolumeMounts.
The k8s native types have json tags, so this commit adds a template func to
first marshal and get json encoding and then convert to yaml.

In addition to storing it on the disk

Earlier we checked for AlwaysPullImages only if PodSecurityPolicy
is true clause, need both checks separately.

If cloudprovider is set (not empty), set the bind address because the node will not be able to retrieve it's IP address because the nodename could be set by the cloud provider (e.g. AWS and Openstack)

This could just use concatenation, but consistency is key.