[PHP][Symfony] Further enhancements (#7001)

* Further enchancements for PHP-Symfony. Fixes issues described in #6999

* Ran shell script to update petstore sample

samples/server/petstore/php-symfony/SymfonyBundle-php/Api/UserApiInterface.php

@@ -51,6 +51,8 @@ interface UserApiInterface
      * @param  integer $responseCode     The HTTP response code to return
      * @param  array   $responseHeaders  Additional HTTP headers to return with the response ()
      *
+     * @return void
+     *
      */
     public function createUser(User $body, &$responseCode, array &$responseHeaders);
 
@@ -63,6 +65,8 @@ interface UserApiInterface
      * @param  integer $responseCode     The HTTP response code to return
      * @param  array   $responseHeaders  Additional HTTP headers to return with the response ()
      *
+     * @return void
+     *
      */
     public function createUsersWithArrayInput(array $body, &$responseCode, array &$responseHeaders);
 
@@ -75,6 +79,8 @@ interface UserApiInterface
      * @param  integer $responseCode     The HTTP response code to return
      * @param  array   $responseHeaders  Additional HTTP headers to return with the response ()
      *
+     * @return void
+     *
      */
     public function createUsersWithListInput(array $body, &$responseCode, array &$responseHeaders);
 
@@ -87,6 +93,8 @@ interface UserApiInterface
      * @param  integer $responseCode     The HTTP response code to return
      * @param  array   $responseHeaders  Additional HTTP headers to return with the response ()
      *
+     * @return void
+     *
      */
     public function deleteUser($username, &$responseCode, array &$responseHeaders);
 
@@ -99,7 +107,7 @@ interface UserApiInterface
      * @param  integer $responseCode     The HTTP response code to return
      * @param  array   $responseHeaders  Additional HTTP headers to return with the response ()
      *
-     * @return Swagger\Server\Model\User
+     * @return Swagger\Server\Model\User[]
      *
      */
     public function getUserByName($username, &$responseCode, array &$responseHeaders);
@@ -127,6 +135,8 @@ interface UserApiInterface
      * @param  integer $responseCode     The HTTP response code to return
      * @param  array   $responseHeaders  Additional HTTP headers to return with the response ()
      *
+     * @return void
+     *
      */
     public function logoutUser(&$responseCode, array &$responseHeaders);
 
@@ -140,6 +150,8 @@ interface UserApiInterface
      * @param  integer $responseCode     The HTTP response code to return
      * @param  array   $responseHeaders  Additional HTTP headers to return with the response ()
      *
+     * @return void
+     *
      */
     public function updateUser($username, User $body, &$responseCode, array &$responseHeaders);
 }