Test are failing on slop

[ashtul]

Related to RediSearch/RediSearch#1986

[ashtul]

@AvitalFineRedis
Fixed by RediSearch/RediSearch#1994
Waiting to be cherry picked to 2.0 branch

[rafie]

RediSearch:latest will fail as it (2.0.9) does not yet contain the fix. CircleCI currently runs on RediSearch:edge to avoid that. We'll go back to RediSearch:master once 2.0.10 is released.