Added delegate helpers to easily access API services and queries from assertions.
Added delegate helpers to easily access narrowed queries.
Renamed test case in order to prepare for new ones.
Removed obsolete boilerplate code.
Implemented, tested and documented hasPassed assertion for process instances.
Improved upon isWaitingAt assertion for process instances by allowing to define more than one activityId as parameter.
Implemented, tested and documented isWaitingAtExactly assertion for process instances.
Refactored hasPassed assertion for process instances in order to prepare for hasPassedExactly assertion.
 Implemented, tested and documented hasPassedExactly assertion for process instances.