change default warmed container keeping count (apache#5328)

Co-authored-by: Brendan Doyle <[email protected]>

Author: 2 people

core/invoker/src/main/scala/org/apache/openwhisk/core/invoker/FPCInvokerReactive.scala

@@ -151,7 +151,7 @@ class FPCInvokerReactive(config: WhiskConfig,
     Identity
       .get(authStore, EntityName(invocationNamespace))(trasnid)
       .map { identity =>
-        val warmedContainerKeepingCount = identity.limits.warmedContainerKeepingCount.getOrElse(1)
+        val warmedContainerKeepingCount = identity.limits.warmedContainerKeepingCount.getOrElse(0)
         val warmedContainerKeepingTimeout = Try {
           identity.limits.warmedContainerKeepingTimeout.map(Duration(_).toSeconds.seconds).get
         }.getOrElse(containerProxyTimeoutConfig.keepingDuration)