Initial commit for nsx cookbook

NSX cookbook was forked from
https://github.com/cloudbau/chef-nvp
Rename deprecated nvp to nsx
Regression changes for Ruby 1.8 and Chef-server 10
Integration nsx cookbook with neutron barclamp
Improve bridge configuration for NSX support

 * Change conditions for PKI generation
 * Remove 'notifies' for bridge configuration
 * Prevent configuration for vlan backend bridge
   on administration interface
Merge pull request #145 from mjura/nsx-api-addons

Adding NSX API support in NSX integration