* Switch to autoCommit=false so that unnecessary transactions
are not created.
* Mark timestamps cache explicitly non-transactional.
* Move away from using caches as a way to send evict all
notifications. Instead, use custom commands provided by Infinispan.
* Get rid of the JDBC transaction test because it does not make
sense configuring JDBC transactions with Infinispan 2LC.
* Made the configuration file explicitly define optimistic as locking
mode.
* Make sure a transaction manager that hooks to Hibernate's TM
is configured.
* Query and timestamp caches now use cluster cache loader instead of
state transfer in order to remain asynchronous.
* To maintain previous semantics, after query or timestamp regions have
been completely evicted, a check has been added to avoid going remote if
the region was invalid.