Rename test case for executeCommand()

Author: jmikola

tests/manager/manager-executeRawCommand-001.phpt renamed to tests/manager/manager-executeCommand-004.phpt

@@ -1,5 +1,5 @@
 --TEST--
-MongoDB\Driver\Manager::executeRawCommand()
+MongoDB\Driver\Manager::executeCommand() options
 --SKIPIF--
 <?php if (getenv("TRAVIS")) exit("skip This currently tails on Travis because it doesn't run 3.6 yet"); ?>
 <?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>