Add recipe for move of TestHelper

[kthoms]

Is your feature request related to a problem? Please describe.
Class org.operaton.bpm.engine.impl.test.TestHelper has been moved with operaton/operaton#965.

Describe the solution you'd like

The dependency

<dependency>
      <groupId>org.operaton.bpm</groupId>
      <artifactId>operaton-engine</artifactId>
      <classifier>{JUNIT_CLASSIFIER}</classifier>
      <scope>test</scope>
      <version>${project.version}</version>
    </dependency>

has to be added. {JUNIT_CLASSIFIER}is either junit4or junit5, depending on the dependencies of the migrated module.

[cachescrubber]

There are even more classes:

org.operaton.bpm.engine.test.mock.MockExpressionManager -> org.operaton.bpm.engine.impl.mock.MockExpressionManager
org.operaton.bpm.engine.test.mock.Mocks -> org.operaton.bpm.engine.impl.mock.Mocks

One example is ACLTest.kt in the camunda-bpmn-data project: the https://github.com/cachescrubber/camunda-bpm-data/tree/operaton

Manual Migration of a Project: cachescrubber/camunda-bpm-data@46db7de

[cachescrubber]

Example of a project still based on junit4

cachescrubber/camunda-platform-7-mockito@4f28665

[cachescrubber]

Status: Had a discussion with @kthoms. He is currently re-evaluating the package structure and organization of the Mock helpers in the test.mock package.

[cachescrubber]

The keycloak-plugin also used test.mock: operaton/operaton-keycloak@e4143d1