Breaking change:  org.activiti.engine.impl.pvm.delegate; (ActivityBehavior and others) changed to  org.activiti.engine.impl.delegate;

Format back to 2 spaces for now, merging back from Activiti 5 is really an issue with spacing differences

ACT-1159: BPMN Errors can now be thrown in expressions and delegateExpressions of Service Tasks (Thanks to Angel López Cima for the Spring test case and Slawomir Wojtasiak for the patch)

ACT-422 Make spring parsing dependency optional and ACT-574 Rename service task resultVariableName to resultVariable

ACT-347: introduced delegateExpression on serviceTask, taskListener and executionListener. Also refactores all Spring tests while I was at it.

ACT-282 Transforming BpmnJavaDelegation class into JavaDelegation interface.  and moved other unused pvm interfaces to impl internal

ACT-216 added support for storing expression-based service task execution results in process variable as declared in service task definition