Cherry-pick of 11c00977f77f45aa7b0c387dc88360eba0819e8a:
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Author:    Ian Southam <isoutham@schubergphilis.com>

First commit towards moving systemvm to chef based configuration
In this commit

1.  cmdline json databag is created
2.  ip association data bag is created
3.  Basic chef cookbook to manage ips and routes

Conflicts:
	systemvm/patches/debian/config/etc/init.d/cloud-early-config
	systemvm/patches/debian/config/var/chef/cookbooks/README
	tools/appliance/definitions/systemvm64template/postinstall.sh
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Because we've refactored the systemvm template the change to
postinstall.sh now gets its own chef.sh file.