Fixed issues after code sniffer

Author: Andrew Chorniy

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

@@ -9,7 +9,8 @@
 use \Magento\Framework\Api\AttributeValueFactory;
 
 /**
- * Class Customer
+ * Customer data model
+ *
  * @SuppressWarnings(PHPMD.ExcessivePublicCount)
  */
 class Customer extends \Magento\Framework\Api\AbstractExtensibleObject implements
@@ -39,7 +40,7 @@ public function __construct(
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     protected function getCustomAttributesCodes()
     {
@@ -50,6 +51,8 @@ protected function getCustomAttributesCodes()
     }
 
     /**
+     * Get default billing address id
+     *
      * @return string|null
      */
     public function getDefaultBilling()
@@ -489,7 +492,7 @@ public function setDisableAutoGroupChange($disableAutoGroupChange)
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      *
      * @return \Magento\Customer\Api\Data\CustomerExtensionInterface|null
      */
@@ -499,7 +502,7 @@ public function getExtensionAttributes()
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      *
      * @param \Magento\Customer\Api\Data\CustomerExtensionInterface $extensionAttributes
      * @return $this

app/code/Magento/Customer/Test/Unit/Model/Data/CustomerTest.php

@@ -1,4 +1,8 @@
 <?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
 
 namespace Magento\Customer\Test\Unit\Model\Data;
 
@@ -45,12 +49,15 @@ public function testGetGroupId()
      * @dataProvider getCreatedInDataProvider
      *
      * @return void
-    */
+     */
     public function testGetCreatedIn($options, $expectedResult)
     {
-        for ($i = 0; $i < count($options); $i++) {
+        $optionsCount = count($options);
+        $expectedCount = count($expectedResult);
+
+        for ($i = 0; $i < $optionsCount; $i++) {
             $this->model->setCreatedIn($options[$i]);
-            for ($j = $i; $j < count($expectedResult); $j++) {
+            for ($j = $i; $j < $expectedCount; $j++) {
                 $this->assertEquals($expectedResult[$j], $this->model->getCreatedIn());
                 break;
             }