Add REST endpoint for abandon-stack

Implements: blueprint abandon-stack
Change-Id: Ie6151208a540d44a3235cb13b49ef02caa090090
oslo: delete rpc/securemessage.py

It doesn't exist in oslo anymore.

Change-Id: Iebadc7841e394232e2ecc26908b06dd1a099bb9d
oslo: add py3compat

This is automatically pulled in by the new oslo modules

Change-Id: Idba617fbd6ca889a0322461bff4954cd90c9f32a
Use the new oslo py3kcompat.urlutils

Change-Id: I9e5d00a04460ef54d402b69f781d2a69a3bd0082
oslo: update config generator

Change-Id: I5a456fe8a898bc042e7580386b6602b75fa7e1c0
Imported Translations from Transifex

Change-Id: I9e1b34d90a123013f9335c5b5dde3922d4e42456
Merge "oslo: delete rpc/securemessage.py"
Merge "oslo: add py3compat"
Merge "Use the new oslo py3kcompat.urlutils"
Merge "oslo: update config generator"
Merge "Imported Translations from Transifex"
Merge "Add REST endpoint for abandon-stack"