works on aws
Configure nodes in a semi-idempotent way.

Ensure that no more then the exact number of hosts are provisioned
upon request. Because AWS keeps terminated nodes around for a while
instead of using exact IDs we just see if the number of nodes pro-
visioned with tag "server": "openstack-host" matches what we need.
Add script and configuration for EC2 dynamic inventory.
Add variables for AWS instance.
Change to use named AWS instances.
Populate inventory with AWS hostnames
new hosts file generation
corrected hosts
Allow hosts to access other hosts in private network.
removed swift
cleanup and single instance deployment ok
working pxc
support for additional ssh keys
Merge pull request #1 from percona/aws

Aws