Move to dynamic ec2 inventory

Here's hoping this works
yolo

ansible.cfg

@@ -1,5 +1,6 @@
 [defaults]
-inventory = hosts
+#inventory = hosts
+inventory = ec2.py
 remote_user = ubuntu
 private_key_file = ~/.ssh/ansible
 ssh_extra_args =-o ForwardAgent=yes -o StrictHostKeyChecking=no

provision.yml

@@ -1,9 +1,9 @@
 #!/usr/bin/ansible-playbook
 # vim:ft=ansible:
 ---
-- hosts: aws
+- hosts: tag_role_common
   roles:
     - common
-- hosts: ansible
+- hosts: tag_role_ansiblehost
   roles:
     - ansiblehost