Fixed odd kitchen.yml, add zookeeper recipe to runlists.
Limit broker id to 16 bit signed integer for 0.7.x because larger integers cause a java integer overflow. Use platform families in metadata. Indicate that we support RHEL family too!
Merge pull request #7 from hw-cookbooks/broker-id-length

Fixed broker id length for 0.7.x. Cleaned up kitchen.yml and indicated we support RHEL platform family.