qttest: Rename private classes to match Creator standard.

Change-Id: I4926d1947216395a18c2e263417d14d08e9487f4
Reviewed-on: http://codereview.qt-project.org/4301


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Bill King <bill.king@nokia.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>