Add Ansible support for Ironic

Configuration based off upstream documentation here:
http://docs.openstack.org/developer/ironic/deploy/install-guide.html

A few notes:
-ironic-api is not configured to use mod_wsgi
-several places it's noted that discoverd is going away and needs to be
replaced with ironic-inspector - (sqlite connection should be changed
too)
-currently enabling ironic reconfigures nova compute (driver and
scheduler) as well as changes neutron network settings
-a nice enhancement would be to configure the web console

Required post-deployment configuration:

Create the flat network to launch the instances:

neutron net-create --tenant-id $TENANT_ID sharednet1 --shared \
--provider:network_type flat --provider:physical_network physnet1

neutron subnet-create sharednet1 $NETWORK_CIDR --name $SUBNET_NAME \
--ip-version=4 --gateway=$GATEWAY_IP --allocation-pool \
start=$START_IP,end=$END_IP --enable-dhcp

And then the above ID is used to set cleaning_network_uuid in the neutron
section of ironic.conf.

Change-Id: I572e7ff1f23c4e57a2c50817cafe9269fd9950dd
Implements: blueprint ironic-container