QPID-5715: Add new attributes for transaction sync policies into BDB HA virtual host,
           remove 'coalescingSync' attribute from BDB HA virtual host node and always use coalescingSync with replicated environment,
           change attribute 'durability' of  BDB HA virtual host node into derived attribute,
           delegate bdb je transaction creation to EnvironmentFacade,
           with ReplicatedEnvironmentFacade crate transactions with durability having virtual host transaction sync policies
           and ack mode 'SIMPLE_MAJORITY'.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1597801 13f79535-47bb-0310-9956-ffa450edef68