Added a simple test case about serializing/unserializing objects in cache drivers.
Added a simple test case about serializing/unserializing objects in cache drivers.

doctrine/common,dunglas/common,Ocramius/common,guiwoda/common,ptlis/common,TomasVotruba/common,racheldomingo/common,Majkl578/doctrine-common,sachintaware/common,wuxu92/common,gencer/common