Adapted adapter to new TASKANA API + minor bugfixes

TSK-1050: Release build: push-back pom.xml files did not work, but build was green
TSK-1054: Update TaskanaAdapter build config
TSK-1055: Resolve comments from Holger on TSK-973 / PR 22
TSK-1058: Make TaskListener read the schema from properties file only once
TSK-1059: taskana-outbox-rest api doesn't work on WebLogic
TSK-1064: Remove DeclarationOrderCheck from checkstyle
TSK-1081: Adjust Adapter for refactored TASKANA API
TSK-1082: Update the description of the adapter and his functionality on github
TSK-1089: taskanaParseListenerProcessEnginePlugin doesn't obtain a datasource
TSK-1091: travis should ignore dependabot branches for push events
TSK-1092: Adapt Adapter to further TASKANA changes
TSK-1104: TaskanaAdapter doesn't build after renaming...
TSK-1124: Endless retries if a Taskana Task is completed for which the corresponding camunda task is already gone
TSK-1129: Final Adapter adjustments from TASKANA changes
TSK-1130: Update deprecated Adapter method names, javadocs etc

Variable Handling

TSK-911: Store variables in Camunda if task is completed in TASKANA
TSK-1003: Add logging to TaskanaParseListener and TaskanaTaskListener
TSK-1005: Fix Outbox-REST for Jersey use
and some more fixes

Outbox Pattern implementation

0.9.0/1.2.0

fix test failures created with formating

First release

Support for the task lifecycle Camunda -> TASKANA -> Camunda

Initial Version

v0.0.1

TSK-855: Fixed security vulnerability in spring-data-commons