magento/magento2#15255 unlock customer after password reset

Author: andreagaspardo

app/code/Magento/Customer/Model/AccountManagement.php

@@ -624,6 +624,7 @@ public function resetPassword($email, $resetToken, $newPassword)
         $customerSecure->setRpToken(null);
         $customerSecure->setRpTokenCreatedAt(null);
         $customerSecure->setPasswordHash($this->createPasswordHash($newPassword));
+        $this->getAuthentication()->unlock($customer->getId());
         $this->sessionManager->destroy();
         $this->destroyCustomerSessions($customer->getId());
         $this->customerRepository->save($customer);