Class alias from Varien_Profiler to Magento_Profiler for Magento 1

Problem was that Magento 1 does not have an implementation of Magento_Profiler, because this is a Magento 2 class. Added a class alias as simplest way to perform back-port.

This relates to issue 7 (https://github.com/techdivision/TechDivision_MagentoUnitTesting/issues/7)