Revert "[#172283965] Fix error message for the redis client."
Revert "[#172283965] Fix error message for the redis client."

Since we have fixed all the pipelines to use redis 5.0.7 version, we do
not need to update the error messagisg to comply with latest redis
release 6.0.0

This reverts commit 2edc45a4dac378413649582c58b37bda1d4e0dd2.

pivotal-cf/cf-redis-broker,pivotal-cf/cf-redis-broker