remove *.static.cloud-ips.com

Rackspace no longer sets the reverse dns for cloud servers as the spin
up.

https://community.rackspace.com/general/f/34/t/623
Merge branch 'master' of github.com:gtmanfred/ohai
[OHAI-518] remove *.static.cloud-ips.com

Fixes issues with Pull Request #215
- fixes tests
- moves `require "resolve"` to top of file
convert to using ffi-yajl
Merge pull request #344 from opscode/lcg/ffi-yajl-gem

replace ruby-yajl with ffi-yajl gem
Add support for ip version ss131122
Catch specific Resolv exceptions when getting hostname for rackspace.
Stub out and test Resolv exceptions for rackspace hostname attribute.
Version bump and CHANGELOG update after branching out for 7.2.0.
Bump ffi version to something compatible with chef.
Merge pull request #349 from opscode/sersut/ffi-bump

Bump ffi version to something compatible with chef.
Splitting Resolv exception test into multiple tests.

The code was taken from an example given by Bryan McLellan.
Save IAM security credentials only if hint is present
Refactor the network tests to rspec 3, merge in test for new vlan output
Retreive openStack specific metadata
update by comment
Filter IAM from metadata unless 'iam' hint is present.
Merge pull request #350 from opscode/mcquin/chef-1558

Save IAM security credentials only if hint is present
use http_client method
Add new dependcency on net-dhcp.