https://issues.apache.org/jira/browse/AMQ-4689

Allows for the persistence adapter to implement JobSchedulerStore and also allows for user set JobSchedulerStore to be used even when persitence is off on the broker.  

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@1517084 13f79535-47bb-0310-9956-ffa450edef68