Put pre-created resources in state INIT COMPLETE.

Defines an INIT action, and make the resourse state
INIT COMPLETE before they are first created.

Calls to list resources will now include resource that have
not been created yet. This change allows resource topologies
to be displayed throughout the creation of the stack.

Implements blueprint build-heat-graph

Change-Id: I1d98ac21d44ff05183db38d49cbb3599e2812511
Merge "Put pre-created resources in state INIT COMPLETE."