Move nested stack delete test to functional

This tries to prove that if you manually delete a nested
stack, the parent stack is still deletable.

part of blueprint decouple-nested
Change-Id: I1d0bf7b5d982dc1f312fbe70cbb09a2e624e3371
1 file changed
tree: 9fe67ba5fade45649c596e9106e70bfa9c80f879
  1. common/
  2. functional/
  3. scenario/