Use oslo.middleware

Remove outdated code and replace its usages by usages of oslo.middleware
library

Sync latest request_id middleware from oslo-incubator(only to allow
grenade jobs pass)

4ffc4c8 Add middleware.request_id shim for Kilo
4504e4f Remove middleware

Co-Authored-By: Abhishek Chanda <abhishek@cloudscaling.com>
Co-Authored-By: Davanum Srinivas <dims@linux.vnet.ibm.com>

Change-Id: I89ef3df1b8d3b2c6e391d04e89e35f2ee974a3cc
Merge "Use oslo.middleware"