Bump the number of connection that can be re-use in Citadel (#11641)
Bump the number of connection that can be re-use in Citadel (#11641)

* Bump the number of connection that can be re-use in Citadel

* A small fix

smawson/istio,istio/istio,geeknoid/istio,istio/istio,geeknoid/istio,geeknoid/istio,smawson/istio,istio/istio,geeknoid/istio,geeknoid/istio,smawson/istio,smawson/istio,istio/istio,smawson/istio,smawson/istio,geeknoid/istio,istio/istio