Fix stack_resource's handle_adopt

- This changes a call from (non-existing) _to_parameters()
  to child_params() like the other surrounding calls to
  create_with_template()
- Also add a missing check_adopt_complete to stack_resource

Change-Id: I4ab9c299bf41d057f85b59dfdffa985e07a15bac
Merge "Fix stack_resource's handle_adopt"