MAGETWO-91659: Cannot set Phone Number not required

- Fix static tests

Author: VeronikaYarats

app/code/Magento/Customer/Helper/Address.php

@@ -127,27 +127,35 @@ public function getBookUrl()
     }
 
     /**
+     * Retrieve edit url.
+     *
      * @return void
      */
     public function getEditUrl()
     {
     }
 
     /**
+     * Retrieve delete url.
+     *
      * @return void
      */
     public function getDeleteUrl()
     {
     }
 
     /**
+     * Retrieve create url.
+     *
      * @return void
      */
     public function getCreateUrl()
     {
     }
 
     /**
+     * Retrieve block renderer.
+     *
      * @param string $renderer
      * @return \Magento\Framework\View\Element\BlockInterface
      */
@@ -204,6 +212,8 @@ public function getStreetLines($store = null)
     }
 
     /**
+     * Retrieve address format.
+     *
      * @param string $code
      * @return Format|string
      */