Configure ctlplane network with a static IP

Configure ctlplane network with a static IP

This patch updates all network configuration templates so that
we configure the ctlplane network interface with a static IP
instead of using DHCP.

The IP address used for the static IP is passed into each
nested stack network configuration template via the ControlPlaneIp
parameter.

Three new nested stack parameters called ControlPlaneSubnetCidr,
ControlPlaneDefaultRoute, and EC2MetadataIp have been added to help
configure the CIDR, default route, and EC2 metadata route on the ctlplane
statically.  These parameters can be customized via the
parameter_defaults section in the heat environment.

A single new template called net-config-static-bridge.yaml has
been added to help migrate towards using the static
configuration templates when not using network isolation.

Depends-On: I257e1cba6dee16f73f75512d1284e1e3b9d4c831

Change-Id: Ib267e6dcf2d5ff77f7a82ee20a123965c2d07565