Revert db97a05 "Extend EC2 mixin specs..." as btm has added an additional spec.
OHAI-434: Add unit tests for Ec2Metadata#best_api_version
Whitespace
OHAI-434: Raise error on non-200 response when determining EC2 metadata version
OHAI-434: Raise error when no supported EC2 metadata version is found
OHAI-434: Order metadata version with basic String/Array#sort
OHAI-434: Raise error on non-200 response while retrieving EC2 metadata