[tests] Add @medium since this could take a little bit more than 1sec.

tests/Predis/Connection/PhpiredisStreamConnectionTest.php

@@ -109,6 +109,7 @@ class PhpiredisStreamConnectionTest extends ConnectionTestCase
     }
 
     /**
+     * @medium
      * @group connected
      * @expectedException Predis\Protocol\ProtocolException
      * @expectedExceptionMessage Protocol error, got "P" as reply type byte