Support zeebe:bindingType for zeebe:CalledDecision, zeebe:CalledElement and zeebe:FormDefinition

[philippfromme]

Adds support zeebe:bindingType to zeebe:CalledDecision, zeebe:CalledElement and zeebe:FormDefinition.

Examples

<bpmn:businessRuleTask id="BusinessRuleTask_1">
  <bpmn:extensionElements>
    <zeebe:calledDecision bindingType="deployment" decisionId="foo" resultVariable="bar" />
  </bpmn:extensionElements>
</bpmn:businessRuleTask>
<bpmn:callActivity id="CallActivity_1">
  <bpmn:extensionElements>
    <zeebe:calledElement bindingType="deployment" processId="foo" propagateAllChildVariables="false" />
  </bpmn:extensionElements>
</bpmn:callActivity>
<bpmn:userTask id="UserTask_1">
  <bpmn:extensionElements>
    <zeebe:formDefinition bindingType="deployment" formId="foo" />
  </bpmn:extensionElements>
</bpmn:userTask>

Related to camunda/camunda-modeler#4385

[barmac]

[not blocking] Are we going to use the parent type information anywhere? If not, I'd rather expect to use extends property on the type defining the bindingType.

[philippfromme]

You mean "extends": [ "zeebe:CalledDecision", "zeebe:CalledElement", "zeebe:FormDefinition" ]?

[philippfromme]

@barmac I made the change you suggested. Makes much more sense. Good catch.

[barmac]

Exactly.

[barmac]

I left one optional comment but it looks ready to merge.