[replicants] if attempting to declare a replicant multiple times, return the existing replicant instead
[replicants] if attempting to declare a replicant multiple times, return the existing replicant instead

[ci skip]

nseckinoral/nodecg,madmatt/nodecg,nodecg/nodecg,madmatt/nodecg,IgorCandido/igrcnddStreamNotifications,nodecg/nodecg,IgorCandido/igrcnddStreamNotifications,nseckinoral/nodecg,nodecg/nodecg