Catch NotFound in format_stack_resource for nested()

If the underlying nested stack doesn't exist for whatever reason,
calling heat resource-list results in a NotFound response even though heat
stack-show confirms the stack exists.

This change catches NotFound when calling resource.nested() in
format_stack_resource.

Change-Id: Iba92d0590561dffb8f902865cc7134b2eddc23ac
Closes-Bug: #1476834
1 file changed
tree: 81f260fd9445133b5e9c0989a14878a0c494b3dc
  1. common/
  2. functional/
  3. scenario/