ISPN-4881 OptimisticLockingTxClusterExtendedStatisticLogicTest.createBef...

...oreClass fails on JDK8

* Set @Start priority higher than LockManager and RpcManager

https://issues.jboss.org/browse/ISPN-4881
why @danberindei ?I know for now, only the DDLM has a ```@Start``` annotation, but we can add in a future different implementations