Propose Compute Manager Objects Support

This adds a compute-manager-objects-juno spec to represent the work
that needs to be done in the compute manager to move to objects. I
expect that all the remaining work will be finished in Juno.

Related to blueprint compute-manager-objects-juno

Change-Id: I517d2d3984f681d58cd83c27e7935a639975b202
Merge "Propose Compute Manager Objects Support"