MAGETWO-95654: Constraint removal is not treated as destructive operation

- Added foreign key for 'magento_bulk' table;

Author: Alexey Yakimovich

app/code/Magento/AsynchronousOperations/etc/db_schema.xml

@@ -27,6 +27,8 @@
         <constraint xsi:type="unique" name="MAGENTO_BULK_UUID">
             <column name="uuid"/>
         </constraint>
+        <constraint xsi:type="foreign" name="MAGENTO_BULK_USER_ID_ADMIN_USER_USER_ID" table="magento_bulk"
+                    column="user_id" referenceTable="admin_user" referenceColumn="user_id" onDelete="CASCADE"/>
         <index name="MAGENTO_BULK_USER_ID_ADMIN_USER_USER_ID" indexType="btree">
             <column name="user_id"/>
         </index>

app/code/Magento/AsynchronousOperations/etc/db_schema_whitelist.json

@@ -15,7 +15,8 @@
         },
         "constraint": {
             "PRIMARY": true,
-            "MAGENTO_BULK_UUID": true
+            "MAGENTO_BULK_UUID": true,
+            "MAGENTO_BULK_USER_ID_ADMIN_USER_USER_ID": true
         }
     },
     "magento_operation": {