If routing a form with parallel tasks, delegating or reassigning more than one approver fails

[gsteimer]

If a form is routed with parallel tasks (two roles at the same priority), if one approver is delegated or reassigned, the any other users cannot be delegated or reassigned. The first delegate/reassign works, but the second fails with the error below:

2015-11-24 11:15:45,743 39865391    TP-Processor6   ERROR   RESTService -1
java.lang.ArrayIndexOutOfBoundsException: -1
    at java.util.ArrayList.elementData(Unknown Source)
    at java.util.ArrayList.set(Unknown Source)
    at com.tsgrp.opencontent.activiti.workflow.ActivitiWorkflowImpl.setTaskAssignee(ActivitiWorkflowImpl.java:316)
    at com.tsgrp.opencontent.wizard.action.executer.ReassignWizardWorkflowTaskActionExecuter.executeImpl(ReassignWizardWorkflowTaskActionExecuter.java:49)
    at com.tsgrp.opencontent.core.action.executer.AbstractActionExecuter.execute(AbstractActionExecuter.java:183)
    at com.tsgrp.opencontent.core.action.service.CoreActionService.execute(CoreActionService.java:321)
    at com.tsgrp.opencontent.core.action.service.RESTAction.executeActionPost(RESTAction.java:189)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

Before talking this one on, talk to @mikeblum and/or @dgrumieaux. After fixing this, we also need to retest #880

[ZachGerth]

Fixed with Revision # 13358.