RDS stack fails to delete DBInstance instance

[Steven Hardy]

When you delete a stack created with WordPress_With_RDS.template, even when it is fully created (ie different from bug 1096150), it leaves the instance related to the nested DBInstance resource behind after delete (despite no errors being indicated, the stack delete appears to complete successfully)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/19220

[Steven Hardy (shardy)]

Looks like same problem exists for nested LoadBalancer resource too

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/19220
Committed: http://github.com/openstack/heat/commit/f4abb59ef0c3f6e23af2a11c5135dcef136d4631
Submitter: Jenkins
Branch: master

commit f4abb59ef0c3f6e23af2a11c5135dcef136d4631
Author: Steven Hardy <email address hidden>
Date: Tue Jan 8 18:10:22 2013 +0000

    heat engine : DBInstance fix so nested stack is deleted

    Currently the RDS DBInstance resource inherits from stack.Stack but it
    should be stack.NestedStack, which implements handle_delete whereas
    stack.Stack does not, meaning the DBInstance nested stack is never
    deleted when the owning stack gets deleted.

    fixes bug 1097299

    Change-Id: I865611d4de9ea4c3caa43c7a11a28924602a5b0d
    Signed-off-by: Steven Hardy <email address hidden>