[carbon] determine service resource based on attribute instead of platform_family
use python_pip to install the same recent txAMQP lib for all platforms
Merge pull request #38 from eladroz/pip_txamqp

use python_pip to install the same recent txAMQP lib for all platforms
Merge pull request #36 from hw-cookbooks/fix/carbon-cache-service-name

[carbon] service resource based on attribute instead of platform_family