Changed the MemcacheStore class to check if objects which implements ModifiedInfo has changed.
Changed the MemcacheStore class to check if objects which implements ModifiedInfo has changed.

tectronics/simplesamlphp,vivekrajenderan/simplesamlphp,vivekrajenderan/simplesamlphp,vivekrajenderan/simplesamlphp,vivekrajenderan/simplesamlphp,vivekrajenderan/simplesamlphp,tectronics/simplesamlphp,tectronics/simplesamlphp,tectronics/simplesamlphp,tectronics/simplesamlphp