Minor refactoring and bugfix release

We fixed some bugs, did some internal refactoring and added some minor functionallity.

No known breaking changes.

TSK-1035: Merge taskana-simplehistory-spring-test with taskana-simplehistory-rest-spring
TSK-1184: Trace Logging in TaskanaWildfly does not work
TSK-1210: Replace custom LoginModule with Embedded Spring LDAP
TSK-1226: Make Corpus Christi (=Fronleichnam) configurable as custom holiday
TSK-1245: Drop Support for DB2 v10.5
TSK-1247: Remove pro.taskana.common.api.LoggerUtils
TSK-1257: bulk operation for forceCompleteTask
TSK-1261: Make task test data for create/update more robust
TSK-1265: Unify RepresentationModelAssembler#toModel and -#toEntityModel
TSK-1270: remove taskana-simplehistory-spring-test phyisically
TSK-1271: Migrate spring boot properties
TSK-1273: update checkstyle with google-java-format changes
TSK-1274: Automatically check that every commit contains a valid ticket
TSK-1276: Filter selection for workbaskets should use radio buttons
TSK-1280: Sort options for task comments in the REST-API
TSK-1281: Reduce open bugs and recent code smells