BS-14249: support generation of script for initial value of Business

Variable of types containing composition multiple

bundles/plugins/org.bonitasoft.studio.contract/src-test/java/org/bonitasoft/studio/contract/core/mapping/RelationFieldToContractInputMappingTest.java

@@ -92,7 +92,7 @@ public class RelationFieldToContractInputMappingTest {
 
         final MappingOperationScriptBuilder scriptBuilder = fieldToContractInputMapping.getScriptBuilder(aBusinessData().withName("myEmployee").build());
 
-        assertThat(scriptBuilder.toScript()).isEqualTo(
+        assertThat(scriptBuilder.toScript(false)).isEqualTo(
                 "def addressVar = myEmployee.address == null ? new Address() : myEmployee.address" + System.lineSeparator()
                         + "addressVar.street = employee.address.street" + System.lineSeparator()
                         + "return addressVar");

bundles/plugins/org.bonitasoft.studio.contract/src/org/bonitasoft/studio/contract/core/mapping/RootContractInputGenerator.java

@@ -55,15 +55,12 @@ public class RootContractInputGenerator {
         this.expressionBuilder = expressionBuilder;
     }
 
-    public void buildForInstanciation(final BusinessObjectData data) throws OperationCreationException {
-        build(data, true);
-    }
 
     public void build(final BusinessObjectData data) throws OperationCreationException {
         build(data, false);
     }
 
-    private void build(final BusinessObjectData data, final boolean isOnPool) throws OperationCreationException {
+    public void build(final BusinessObjectData data, final boolean isOnPool) throws OperationCreationException {
         contractInput = ProcessFactory.eINSTANCE.createContractInput();
         contractInput.setName(rootContractInputName);
         contractInput.setType(ContractInputType.COMPLEX);