JBPM-3512 - Allow developer-defined correlationId in addition to processInstanceId
Set release version: 6.0.0.Alpha8
Set next development version: 6.0.0-SNAPSHOT
Set release version: Drools 6.0.0.Alpha9 and uberfire 0.2.0.Alpha2
Set next development version: 6.0.0.-SNAPSHOT and uberfire 0.2.0-SNAPSHOT
Rename Drools Planner to OptaPlanner: maven groupId's and artifactId's