Fix for autoloader problems with Varien_Autoload and PHPUnit extension

Posible fix for warnings throwed by Varien_Autoload which are triggered by PHPUnit (class_exist) calls.
AdminGws Problems in EE 1.13

I currently trying to run a controller test in EE 1.13 and i got errors.
It seems that there are three new checks in AdminGws module.
I'm really unsure if this is a correct solution, but i additionally mocked the methods getGwsStores, getGwsStoreGroups and getGwsRelevantWebsites.

Please have a look at my code.
Merge pull request #104 from cmuench/patch-4

AdminGws Problems in EE 1.13
Merge pull request #102 from cmuench/patch-2

Fix for autoloader problems with Varien_Autoload and PHPUnit extension
Fix issue #108
Merge pull request #109 from oleg-kravets/dev

Fix issue #108