EAP 8.1 skips session lock and allows concurrent requests for individual session

Issue

• After upgrading from EAP 8.0 to 8.1, sessions are not being locked as expected with a web cache configuration like below:

                <distributed-cache name="dist">
                    <locking isolation="REPEATABLE_READ"/>
                    <transaction mode="BATCH"/>
                    <expiration interval="0"/>
                    <file-store passivation="true" purge="true"/>
                </distributed-cache>

• Sessions are now being concurrently accessed and modified through multiple requests at a time on EAP 8.1 to result in unexpected behaviors and session state conflicts