[fix] zookeeper max client connection 설정

:Why/What:
- broker 동시 재기동 상태에 있을시 경쟁 조건에 빠지는 이슈 대응

:Tasks:
[CLOUD-21364] 씨젠 의료재단 이슈 처리 건
<https://app.clickup.com/t/25540965/CLOUD-21364>

roles/cmoa_install/files/02-base/base/charts/zookeeper/templates/0.config.yaml

@@ -19,7 +19,6 @@ data:
     dataDir=/var/lib/zookeeper/data
     dataLogDir=/var/lib/zookeeper/log
     clientPort=2181
-    maxClientCnxns=1
     initLimit=5
     syncLimit=2
     server.1=zookeeper-0.zookeeper-headless.imxc.svc.cluster.local:2888:3888:participant