This patch specifies a set of options required to setup the retrying
wrapper feature of pymemcache (dogpile.cache) cache backend.
Original oslo.cache change:
https://review.opendev.org/c/openstack/oslo.cache/+/803747
Co-Authored-By: Hervé Beraud <hberaud@redhat.com>
Depends-On: https://review.opendev.org/826869
Change-Id: Ia0fa98ff49d63332eff8e4e377402d2527b1c595