cubicweb-celerytask #17099826 Use implementation of StrictRedis instead of Redis [open]

StrictRedis is a more pythonic interface, Redis seems to be the deprecated first implementation.

I don't know where changes need to be done, at least lrem in ccplugins needs to be updated.

We bumped into this problem when using celerytask with redis/sentinel. See description here https://github.com/andymccurdy/redis-py/issues/900

Awating this change, cw-celery-helper needs to use Redis as a redis_class when calling get_master_for in https://hg.logilab.org/review/cw-celerytask-helpers/rev/60ec74b816b1#l1.17