Separate public/private autoscaling adjust() APIs

Internal uses of adjust() have slightly different needs.

Change-Id: Ibb85425f08b7b2d78be2d9ef5c8a9f464b7eead1
Signed-off-by: Zane Bitter <zbitter@redhat.com>
Create autoscaling instances in parallel

Fixes bug #1136148

Change-Id: I02ea52df85c4ed7f0f16abcfd1ab24b35168a787
Signed-off-by: Zane Bitter <zbitter@redhat.com>
Merge "Separate public/private autoscaling adjust() APIs"
Merge "Create autoscaling instances in parallel"