fix(cluster_replication): replicate redis cluster node bug fix

[adiholden]

The bug: When replicating redis cluster node we move the server to loading state in the full sync phase with the node, when other cluster redis nodes are in stable sync and executing commands we rejected the commands execution due to loading state of server. The fix: setting conn_context.journal_emulated = true will make sure we dont reject the command on loading state

resolves: #2886