Migration functionality

1) It is allowed to use of different version in composition definition element

Example:
Creation composition "1.2.3" and prime (compositionId):

    onap.policy.clamp.ac.element.AutomationCompositionDefinition:
      version: 1.2.3
      type: org.onap.policy.clamp.acm.AutomationComposition
      type_version: 1.0.1
      description: Automation composition for Demo
      properties:
        provider: ONAP
        elements:
          - name: onap.policy.clamp.ac.element.Policy_AutomationCompositionElement
            version: 1.2.3

Creation Instance and deploy:

elements:
  709c62b3-8918-41b9-a747-d21eb79c6c30:
    id: 709c62b3-8918-41b9-a747-d21eb79c6c30
    definition:
       name: onap.policy.clamp.ac.element.Policy_AutomationCompositionElement
       version: 1.2.3

Creation Composition 1.2.4 and prime (compositionTargetId):

    onap.policy.clamp.ac.element.AutomationCompositionDefinition:
      version: 1.2.4
      type: org.onap.policy.clamp.acm.AutomationComposition
      type_version: 1.0.1
      description: Automation composition for Demp
      properties:
        provider: ONAP
        elements:
          - name: onap.policy.clamp.ac.element.Policy_AutomationCompositionElement
            version: 1.2.4

Migration Instance from 1.2.3 to 1.2.4:

elements:
  709c62b3-8918-41b9-a747-d21eb79c6c30:
    id: 709c62b3-8918-41b9-a747-d21eb79c6c30
    definition:
       name: onap.policy.clamp.ac.element.Policy_AutomationCompositionElement
       version: 1.2.4

public void migrate(UUID instanceId, AcElementDeploy element, UUID compositionTargetId,
Map<String, Object> properties) throws PfModelException {

Retrieve outProperties from composition 1.2.3 and 1.2.4

var automationComposition = participantIntermediaryApi.getAutomationComposition(instanceId);
var compositionId = automationComposition.getCompositionId();

var acElementDefinition = participantIntermediaryApi.getAcElementDefinition(compositionId,
    new ToscaConceptIdentifier("onap.policy.clamp.ac.element.Policy_AutomationCompositionElement", "1.2.3"));
var outProperties123 = acElementDefinition.getOutProperties();

var acElementDefinition = participantIntermediaryApi.getAcElementDefinition(compositionTargetId,
    new ToscaConceptIdentifier("onap.policy.clamp.ac.element.Policy_AutomationCompositionElement", "1.2.4"));
var outProperties124 = acElementDefinition.getOutProperties();

Retrieve outProperties in real scenario

var automationComposition = participantIntermediaryApi.getAutomationComposition(instanceId);
var compositionId = automationComposition.getCompositionId();
var acElementDefinitionsFrom = participantIntermediaryApi.getAcElementsDefinitions(compositionId);
var acElementDefinitionFrom = acElementsDefinitionsFrom.values().stream()
    .filter(el -> el.getAcElementDefinitionId().getName().equals(element.getDefinition().getName())).findFirst().get();
var outPropertiesFrom = acElementDefinitionFrom.getOutProperties();

var acElementDefinitionTo = participantIntermediaryApi.getAcElementDefinition(compositionTargetId, element.getDefinition());
var outPropertiesTo = acElementDefinitionTo.getOutProperties();