STFU Rubocob.

Signed-off-by: Stev Witzel <switzel@pivotal.io>
AWS m3 instances sometimes fail to honor the AMI's block_device_mappings
  config, so we must specify it when creating the instance also. [#84893804]

Signed-off-by: Stev Witzel <switzel@pivotal.io>
permit newer nokogiri
allow upstream vcloud_cpi improvements that include nokogiri updates
update thin & dependencies to latest; ready for traveling-ruby native gems
ensure access to latest fixed vcloud cpi