Move suspend/resume autoscaling tests to functional

Note:
- there is no special suspend/resume logic in the autoscaling code
  (this is just calling the nested stack's action)
- this patch includes a basic functional test to suspend/resume.

part of blueprint decouple-nested

Change-Id: I506a8e8258ebfb136637645e51b1faf3a7be4260
1 file changed
tree: 85cb413bc22a5f53849c0d9d285162fe5dc0f2b8
  1. common/
  2. functional/
  3. scenario/