Select primary server for use in write command tests

Author: jmikola

tests/server/server-executeReadWriteCommand-001.phpt

@@ -11,7 +11,7 @@ require_once __DIR__ . "/../utils/basic.inc";
 require_once __DIR__ . "/../utils/observer.php";
 
 $manager = new MongoDB\Driver\Manager(URI);
-$server = $manager->selectServer(new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::RP_SECONDARY));
+$server = $manager->selectServer(new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::RP_PRIMARY));
 
 (new CommandObserver)->observe(
     function() use ($server) {

tests/server/server-executeWriteCommand-001.phpt

@@ -11,7 +11,7 @@ require_once __DIR__ . "/../utils/basic.inc";
 require_once __DIR__ . "/../utils/observer.php";
 
 $manager = new MongoDB\Driver\Manager(URI);
-$server = $manager->selectServer(new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::RP_SECONDARY));
+$server = $manager->selectServer(new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::RP_PRIMARY));
 
 $bw = new MongoDB\Driver\BulkWrite();
 $bw->insert(['a' => 1]);