Migrate to oslo.middleware

Synced middleware module from incubator instead of removing it
completely. This is needed for grenade and to keep backwards
compatibility with existing installations with old api-paste.ini.

'log' module is updated as a dependency for middleware module.

'versionutils' are added as a new dependency for middleware module.

Closes-Bug: #1371701
Change-Id: Ib1c3161ccc98642091134f2285fed7c90244e600
Co-Authored-By: Ihar Hrachyshka <ihrachys@redhat.com>
Merge "Migrate to oslo.middleware"