new metadata server url
typo
small change for hostname
updated metadata hostname
GCEL is deprecated
verify gce only by metadata.google.internal, remove dmi check
Merge branch '6-stable-gce-metadata-update' into 6-stable

Conflicts:
	lib/ohai/plugins/gce.rb
	spec/unit/plugins/gce_spec.rb
	spec/unit/plugins/linux/platform_spec.rb