Expose methods to allow users of the database class to control when transactions occur.

tests/all_tests.php

@@ -54,10 +54,14 @@ send_event(new InitExtEvent());
 send_event(new UserCreationEvent("demo", "demo", ""));
 $database->commit(); // Need to commit the new user to the database.
 
+$database->beginTransaction();
+
 send_event(new UserCreationEvent("test", "test", ""));
 $database->commit(); // Need to commit the new user to the database.
 
 
+$database->beginTransaction();
+
 // Now we can run all the tests.
 $all = new TestFinder("");
 $results = $all->run(new TextReporter());