[Blocking] Ocelots sometimes spawn in groups

Verification builds: 1.2.10 (662590)

Summary: Ocelots sometimes spawn with babies without a way to disable this automatic behaviour. We were intending on using the Ocelot entity to utilise 'variants' to provide different textures for different entity states.

Impact: Multiple entities spawn without a way to disable this behaviour.

Repro Steps:

1. Spawn an ocelot
2. Repeat, until you notice multiple entities spawn

Observed Results: Multiple ocelots sometimes spawn.

Expected Results: There should be a behaviour in the JSON to control/disable this.

Screenshots/Videos attached: Yes (https://www.youtube.com/watch?v=pvVSkLD_9F8)