ACT-1724 Added taskNameIn(List<String>) and taskNameInIgnoreCase(List<String>) to org.activiti.engine.task.TaskInfoQuery

Added those methods to interface and implemented in org.activiti.engine.impl.HistoricTaskInstanceQueryImpl and org.activiti.engine.impl.TaskQueryImpl. org/activiti/db/mapping/entity/Task.xml and org/activiti/db/mapping/entity/HistoricTaskInstance.xml files are updated for those 2 new queries. Added new test cases to org.activiti.engine.test.api.task.TaskQueryTest and org.activiti.engine.test.history.HistoricTaskInstanceTest.