Integration test changes

Author: solwininfotech

app/code/Magento/Sales/Block/Adminhtml/Order/Create/Form/Account.php

@@ -165,14 +165,17 @@ public function getFormValues()
     {
         try {
             $customer = $this->customerRepository->getById($this->getCustomerId());
-            $data = $this->_extensibleDataObjectConverter->toFlatArray(
-                $customer,
-                [],
-                CustomerInterface::class
-            );
         } catch (\Exception $e) {
-            $data = [];
+            /** If customer does not exist do nothing. */
         }
+        $data = isset($customer)
+            ? $this->_extensibleDataObjectConverter->toFlatArray(
+                $customer,
+                [],
+                \Magento\Customer\Api\Data\CustomerInterface::class
+            )
+            : [];
+
         foreach ($this->getQuote()->getData() as $key => $value) {
             if (strpos($key, 'customer_') === 0) {
                 $data[substr($key, 9)] = $value;