Feature/customize client.rb for filter attributes.

[sawanoboly]

from knife.rb

knife[: automatic_attribute_whitelist] = [
  "fqdn/",
  "ipaddress/",
  "roles/",
  "recipes/",
  "ipaddress/",
  "platform/",
  "platform_version/",
  "cloud",
  "cloud_v2"
]

to client.rb

...

automatic_attribute_whitelist ["fqdn/", "ipaddress/", "roles/", "recipes/", "ipaddress/", "platform/", "platform_version/", "cloud", "cloud_v2"]

creates

{
  "name": "knife-zero02",
  "normal": {
    "tags": [

    ]
  },
  "automatic": {
    "ipaddress": "133.242.xxx.xxx",
    "roles": [

    ],
    "recipes": [

    ],
    "platform": "ubuntu",
    "platform_version": "14.04",
    "cloud_v2": null
  }