GraphQL-672: [Test coverage] Change customer password

Author: naydav

dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/ChangeCustomerPasswordTest.php

@@ -70,7 +70,7 @@ public function testChangePassword()
         $headerMap = $this->getCustomerAuthHeaders($customerEmail, $currentPassword);
 
         $response = $this->graphQlMutation($query, [], '', $headerMap);
-        $this->assertEquals($customerEmail, $response['changePassword']['email']);
+        $this->assertEquals($customerEmail, $response['changeCustomerPassword']['email']);
 
         try {
             // registry contains the old password hash so needs to be reset