- updated environments with :delegated parameter on docker env

- added 'final' steps on workflows
- removed deletion of old customer data in order to preserve possible extended fields and keep issues with old foreign keys at bay
- updated UPGRADE file in order to specify additional step for Marello upgrade to 3.0 for smooth transition
- updated README of EE in order to update the current requirements for Marello 3.0 applications

src/Marello/Bundle/CustomerBundle/Migrations/Schema/v1_2/MigrateExtendedData.php

@@ -33,11 +33,7 @@ public function up(Schema $schema, QueryBag $queries)
                 'UPDATE oro_attachment SET customer_d5a7d2a4_id = customer_63c5df30_id'
             )
         );
-        $queries->addPreQuery(
-            new ParametrizedSqlMigrationQuery(
-                'DELETE FROM marello_order_customer'
-            )
-        );
+
         $attachmentTable = $schema->getTable('oro_attachment');
         $attachmentTable->dropColumn('customer_63c5df30_id');
         $attachmentTable->removeForeignKey('FK_FA0FE081ADEA609C');

src/Marello/Bundle/OrderBundle/Resources/config/oro/workflows.yml

@@ -28,7 +28,7 @@ workflows:
                     - hold_pending
                     - cancel
             cancelled:
-                allowed_transitions: []
+                is_final: true
             pending_on_hold:
                 allowed_transitions:
                     - un_hold_pending
@@ -46,7 +46,7 @@ workflows:
                 allowed_transitions:
                     - ship
             shipped:
-                allowed_transitions: []
+                is_final: true
 
         transitions:
             pending: