Fix issues with Redis Replication extension tests.

[ryan-gang]

Fixes :

1. Properly handle first command sent by User. (Previous test was explicitly waiting and testing for SELECT commands, updated that to skip if SELECT is received, if not proceed with assertion.)
2. Add case sensitive matching for commands propagated. (REDIS commands are excluded.)
3. Update all error statements statements to be more consistent.
4. Remove 2nd WAIT test case. (Makes the entire stage > 10s).
5. Update logs to say "Master is running on XXXX".
6. Create FakeRedisNode to share methods between Replica and Master. (Refactor and create shared struct).
7. Add util method readAndAssertMessagesWithSkip, and refactor code. (re : Point 1)
   Same code was used across multiple files.
8. Add LogPrefix for other stages with multiple replicas.
9. Update log prefix to: [replica-N] and [client].
10. Add updated fixtures.