Update redis image

Customer is running a OPSH 4.5 Cluster with Quay as Image Registry. After enabling the image signature verification the Red Hat Quay deployment broke cause the redis-32-rhel7 has not been pulled.

Here is the failure message: Failed to pull image "

registry.access.redhat.com/rhscl/redis-32-rhel7

": rpc error: code = Unknown desc = Source image rejected: A signature was required, but no signature exists.

I opened https://bugzilla.redhat.com/show_bug.cgi?id=1883205 to get this image signed and got a response:
The redis 3.2 image is obsoleted since Redis 3.2 in RHSCL was retired in November 2019, see:
https://access.redhat.com/support/policy/updates/rhscl-rhel7
The Redis 5 image appears to be correctly signed:
https://catalog.redhat.com/software/containers/rhscl/redis-5-rhel7
if the existence of the 3.2 image still blocks use of Quay that needs to be escalated some other way.