owner and planned bulk update

TSK-931: Implement a global error handler
TSK-998: Activate more Eslint-settings and fix the errors
TSK-1018: AccessItem List does not show results after selecting a user
TSK-1024: Can't select ldap group as owner of workbasket
TSK-1034: Bump spring-restdocs-mockmvc from 2.0.2.RELEASE to 2.0.4.RELEASE
TSK-1103: Change vulnerable logging messages
TSK-1112: Add "method" parameter to @RequestMapping
TSK-1131: Bulk-Aktion zum Verändern von Task-Ownern
TSK-1135: Remove JUnit4 dependency in taskana-simplehistory-spring-test and convert to AssertJ
TSK-1137: Create Endpoint to cancel claim a task in REST-API
TSK-1138: Remove JUnit4 dependency in taskana-spring-example
TSK-1139: Bulk operation to change planned date for multiple tasks
TSK-1140: Correct ClassificationResourceAssembler
TSK-1141: Remove JUnit4 dependency in taskana-spring and convert to AssertJ
TSK-1146: Add ConstantNameCheck to checkstyle
TSK-1147: Use RestHelper.TEMPLATE
TSK-1148: Add Application-Entry-Point to ClassificationSummaryResource
TSK-1151: Example requests/responses should be printed readable in REST API doc