Engine changes for API param to show soft-deleted stacks

blueprint stack-list-soft-deleted

Change-Id: Ie649d9a2b4132795e048325dedc46900c6f34eac
API changes for param to show soft-deleted stacks

blueprint stack-list-soft-deleted

Change-Id: I9b56ee877746c25c6acefb91fc3eae63701aedd6
Update olso modules

Now at oslo commit a08a622bc68c34291a116f7073511b02585d1c17

Change-Id: Ifd335dac76cdb880661cbd6378438fcebaf295cf
Stop periodic watcher tasks before deleting stack

In the case where a stack that has a watch task associated with it is
being deleted and the engine successfully acquires a lock, no attempt to
stop the stack will be made since it has no action in-progress.  This
will result in orphaned watcher tasks being left behind, since the
watcher tasks are normally stopped as part of the call to
ThreadGroup.stop().

To fix this, explicitly stop the periodic watcher tasks before calling
stack.delete().

Change-Id: Idf5b7c1100fc85743ac6dc5831731f7ecc96bfd6
Closes-Bug: #1315044
Merge "Update olso modules"
Merge "Stop periodic watcher tasks before deleting stack"
Merge "Engine changes for API param to show soft-deleted stacks"
Merge "API changes for param to show soft-deleted stacks"