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

Variable of types containing composition multiple (there was still
missing a part, don't know why some usecases were working)

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

@@ -55,11 +55,15 @@ 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);
     }
 
-    public void build(final BusinessObjectData data, final boolean isOnPool) throws OperationCreationException {
+    private void build(final BusinessObjectData data, final boolean isOnPool) throws OperationCreationException {
         contractInput = ProcessFactory.eINSTANCE.createContractInput();
         contractInput.setName(rootContractInputName);
         contractInput.setType(ContractInputType.COMPLEX);

bundles/plugins/org.bonitasoft.studio.contract/src/org/bonitasoft/studio/contract/ui/wizard/ContractInputGenerationWizard.java

@@ -131,7 +131,11 @@ public class ContractInputGenerationWizard extends Wizard {
         final RootContractInputGenerator contractInputGenerator = new RootContractInputGenerator(contractInputFromBusinessObjectWizardPage.getRootName(),
                 contractInputFromBusinessObjectWizardPage.getMappings(), repositoryAccessor, operationBuilder, expressionBuilder);
         try {
-            contractInputGenerator.build(data);
+            if (contractContainer instanceof Pool) {
+                contractInputGenerator.buildForInstanciation(data);
+            } else {
+                contractInputGenerator.build(data);
+            }
         } catch (final OperationCreationException e) {
             BonitaStudioLog.error("Failed to create Operations from contract", e);
             new BonitaErrorDialog(getShell(), Messages.errorTitle, Messages.contractFromDataCreationErrorMessage, e).open();
@@ -176,7 +180,7 @@ public class ContractInputGenerationWizard extends Wizard {
             MessageDialog.openWarning(getShell(), Messages.notAllAttributesGeneratedTitle, Messages.notAllAttributesGeneratedMsg);
         }
     }
-    
+
      /**
      * @return
      */