Invocation batching not enabled errors when using DIST mode for web sessions

This is a regression caused by a change to DefaultEmbeddedCacheManager, where calls to getCache(...) for a non-existent cache result in the cache being based on the CacheContainer.DEFAULT_CACHE, not the default-cache.

11:25:20,945 WARN [org.jboss.as.clustering.web.infinispan.DistributedCacheManager] (notification-thread-0) Invocation batching not enabled in current configuration! Please use the <invocationBatching /> element.: org.infinispan.config.ConfigurationException: Invocation batching not enabled in current configuration! Please use the <invocationBatching /> element.
at org.infinispan.CacheImpl.startBatch(CacheImpl.java:433) [infinispan-core-5.0.0.FINAL.jar:5.0.0.FINAL]
at org.infinispan.AbstractDelegatingCache.startBatch(AbstractDelegatingCache.java:66) [infinispan-core-5.0.0.FINAL.jar:5.0.0.FINAL]
at org.jboss.as.clustering.web.infinispan.DistributedCacheManager$JvmRouteHandler.batch(DistributedCacheManager.java:618)
at org.jboss.as.clustering.web.infinispan.DistributedCacheManager$JvmRouteHandler.viewChanged(DistributedCacheManager.java:666)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_23]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [:1.6.0_23]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [:1.6.0_23]
at java.lang.reflect.Method.invoke(Method.java:616) [:1.6.0_23]
at org.infinispan.notifications.AbstractListenerImpl$ListenerInvocation$1.run(AbstractListenerImpl.java:200) [infinispan-core-5.0.0.FINAL.jar:5.0.0.FINAL]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [:1.6.0_23]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [:1.6.0_23]
at java.lang.Thread.run(Thread.java:679) [:1.6.0_23]