* Fix inconsistent handling of admission plugin list
* Adjust hardening doc with the normalized admission plugin list
* Add pre-check for admission plugins format change
* Ignore checking admission plugins value when variable is not defined
* extra admission controls now don't have a version in their file names
eventratelimit.v1beta2.yaml.j2 -> eventratelimit.yaml.j2
* cri_socket variable includes the unix:// prefix to be conformat with
upstream