Repaired liboptions behaviour
Divided tests for Redis lib options into existing instance and new instance, removed unnecessary listening in Redis, added trigger of an event when lib option is set, removed unnecessary reconnect
Removed unnecessary comment and array in EventManager attach
Merge pull request #4603 from piteer1/hotfix-redis-liboption

[BUG] Redis Storage won't behave correctly after libOptions were set
Merge branch 'hotfix/4603'

Close #4603
Fixes #4576
Fixes #4577