[cern] Resolve stack outputs only on COMPLETE
cherry-picked from: https://review.openstack.org/#/c/582506/
While the stack is not COMPLETE, we do not need to resolve the outputs of the stack. Resolving the outputs is expensive for large stacks.
story: 2002959 task: 22961
Change-Id: I26861214bba8cc92f4e7f9ecba5ba51df99346cb Signed-off-by: Spyros Trigazis spyridon.trigazis@cern.ch
Closes OS-7074
Edited by Spyridon Trigazis