Migrate to oslo.middleware
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 <b339079bdd0c511d3934e046f7b02c5281dc2db1@redhat.com>

wolverineav/networking-bigswitch,stackforge/networking-bigswitch,stackforge/networking-bigswitch,wolverineav/networking-bigswitch,openstack/networking-bigswitch,openstack/networking-bigswitch