[svn r6284] skip tests if extension not installed
[svn r6284] skip tests if extension not installed

--HG--
branch : trunk

AlexMarlo/limb,limb-php-framework/limb,anoam/limb,limb-php-framework/limb,AlexMarlo/limb,AlexMarlo/limb,anoam/limb,limb-php-framework/limb-cms,limb-php-framework/limb-cms,limb-php-framework/limb,limb-php-framework/limb,limb-php-framework/limb,anoam/limb,anoam/limb,anoam/limb,anoam/limb