Add depedencies for move from go-yaml/yaml to ghodss/yaml

Also add go-spew for better debugging.
Move from go-yaml/yaml to ghodss/yaml
Remove unused yaml v1 (moved to ghodss/yaml)
Remove unused YAML tags and GetYAML/SetYAML methods

Unneeded after move to ghodss/yaml.
Merge pull request #2676 from ghodss/move-to-ghodss-yaml

Move from go-yaml/yaml v1 to ghodss/yaml