MAGETWO-36701: Admin user isn't locked after exceeding maximum login failures attempts

 - modified exception handling to use the message passed in the original exception
 - updated associated test

Author: Cari Spruiell

app/code/Magento/Backend/Model/Auth.php

@@ -175,7 +175,7 @@ public function login($username, $password)
                 'backend_auth_user_login_failed',
                 ['user_name' => $username, 'exception' => $e]
             );
-            self::throwException(__('Please correct the user name or password.'));
+            self::throwException(__($e->getMessage()? : 'Please correct the user name or password.'));
         }
     }
 

app/code/Magento/Backend/Test/Unit/Model/AuthTest.php

@@ -59,7 +59,7 @@ public function testLoginFailed()
             ->method('create')
             ->with('Magento\Backend\Model\Auth\Credential\StorageInterface')
             ->will($this->returnValue($this->_credentialStorage));
-        $exceptionMock = new \Magento\Framework\Exception\LocalizedException(__('message'));
+        $exceptionMock = new \Magento\Framework\Exception\LocalizedException(__(''));
         $this->_credentialStorage
             ->expects($this->once())
             ->method('login')