WFLY-3270 Clustered support for HTTPSession sharing between wars delivered in an EAR

Conflicts:
	clustering/web/infinispan/src/main/java/org/wildfly/clustering/web/infinispan/InfinispanWebLogger.java
	clustering/web/infinispan/src/main/java/org/wildfly/clustering/web/infinispan/session/InfinispanSessionManagerFactory.java
	testsuite/integration/clust/src/test/java/org/jboss/as/test/clustering/cluster/session/persistence/SessionClusterDbPersistenceTestCase.java
	testsuite/integration/clust/src/test/java/org/jboss/as/test/clustering/cluster/web/CoarseWebFailoverTestCase.java
	testsuite/integration/clust/src/test/java/org/jboss/as/test/clustering/cluster/web/GranularWebFailoverTestCase.java
	testsuite/integration/clust/src/test/java/org/jboss/as/test/clustering/cluster/web/ReplicationForNegotiationAuthenticatorTestCase.java
Merge pull request #4 from pferraro/undertow-backport

Backport WFLY-3270 Clustered support for HTTPSession sharing between wars delivered in an EAR