Fix tests for applications managing API

tests/codeception/api/functional/oauth/CreateClientCest.php

@@ -81,7 +81,6 @@ class CreateClientCest {
                 'clientId' => 'my-amazing-server',
                 'name' => 'My amazing server',
                 'websiteUrl' => 'http://some-site.com',
-                'countUsers' => 0,
                 'minecraftServerIp' => 'hypixel.com:25565',
             ],
         ]);

tests/codeception/api/functional/oauth/GetClientsCest.php

@@ -68,7 +68,6 @@ class GetClientsCest {
                 'name' => 'Another test oauth client',
                 'websiteUrl' => '',
                 'minecraftServerIp' => '136.243.88.97:25565',
-                'countUsers' => 0,
                 'createdAt' => 1519487472,
             ],
         ]);