MAGETWO-86545: [Backport 2.3-develop] Handle multiple errors in customer address validation when shown in adminhtml customer edit page #12937

 - Merge Pull Request #12937 from adrian-martinez-interactiv4/magento2:FR23#ADMINHTML-CUSTOMER-SAVE-MULTIPLE-ERROR-MESSAGES
 - Merged commits:
   1. 19fbeee

Author: dmanners

app/code/Magento/Customer/Controller/Adminhtml/Index/Save.php

@@ -13,6 +13,9 @@
 use Magento\Customer\Model\Metadata\Form;
 use Magento\Framework\Exception\LocalizedException;
 
+/**
+ * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
+ */
 class Save extends \Magento\Customer\Controller\Adminhtml\Index
 {
     /**
@@ -268,6 +271,15 @@ public function execute()
                 $this->_addSessionErrorMessages($messages);
                 $this->_getSession()->setCustomerFormData($originalRequestData);
                 $returnToEdit = true;
+            } catch (\Magento\Framework\Exception\AbstractAggregateException $exception) {
+                $errors = $exception->getErrors();
+                $messages = [];
+                foreach ($errors as $error) {
+                    $messages[] = $error->getMessage();
+                }
+                $this->_addSessionErrorMessages($messages);
+                $this->_getSession()->setCustomerFormData($originalRequestData);
+                $returnToEdit = true;
             } catch (LocalizedException $exception) {
                 $this->_addSessionErrorMessages($exception->getMessage());
                 $this->_getSession()->setCustomerFormData($originalRequestData);