Convert Instance to new Schema format

Also, the HA Restarter.

blueprint property-schema-conversion

Change-Id: I64d7a963cc96d82538b9fc8a2965c9a11a3a7a83
Add an external gateway property to neutron router

Deprecates existing RouterGateway resource and adds external_gateway property
to neutron Router resource to set up the gateway.

Change-Id: Ic61a817e699d2a005c4eb2c5d7b23ae9a70567c0
Closes-Bug: #1246064
Merge "Convert Instance to new Schema format"
Merge "Add an external gateway property to neutron router"