This patch set corrects a problem when the keystonemiddleware is
executed with memcache encryption enabled. Currently, the
hmac.new() calls throw exceptions in python3 due to how py2 and py3
handles string vs. byte/bytearray.
Co-Authored-By: Rohan Arora <ra271w@att.com>
Closes-Bug: #1713574
Change-Id: I9bb291be48a094b9f266a8459a3f51ee163d33a3