Add Pingdom IPs to global whitelist using their API
Add node[haproxy] attributes to Test Kitchen config
Clean up Test Kitchen config, make settings as YAML-y as possible

Also migrate some settings up from suite to provisioner level
Add stubs for Pingdom API response & api_keys data bag item

Tests required a Fog mock will continue to fail, however
Merge pull request #1 from evertrue/jeff/add-pingdom-whitelisting

Add Pingdom API whitelisting