Fix titles of Server session pinning tests

Author: jmikola

tests/server/server-executeReadCommand-002.phpt

@@ -1,5 +1,5 @@
 --TEST--
-MongoDB\Driver\Session test: Manager::executeReadCommand pins transaction to server
+MongoDB\Driver\Server::executeReadCommand() pins transaction to server
 --SKIPIF--
 <?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
 <?php skip_if_not_mongos_with_replica_set(); ?>

tests/server/server-executeReadWriteCommand-002.phpt

@@ -1,5 +1,5 @@
 --TEST--
-MongoDB\Driver\Session test: Manager::executeReadWriteCommand pins transaction to server
+MongoDB\Driver\Server::executeReadWriteCommand() pins transaction to server
 --SKIPIF--
 <?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
 <?php skip_if_not_mongos_with_replica_set(); ?>

tests/server/server-executeWriteCommand-002.phpt

@@ -1,5 +1,5 @@
 --TEST--
-MongoDB\Driver\Session test: Manager::executeWriteCommand pins transaction to server
+MongoDB\Driver\Server::executeWriteCommand() pins transaction to server
 --SKIPIF--
 <?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
 <?php skip_if_not_mongos_with_replica_set(); ?>