Replaced integration.py with test_integration
Replaced integration.py with test_integration

ewdurbin/pymemcache,bwalks/pymemcache,adamchainz/pymemcache,harlowja/pymemcache,pinterest/pymemcache,thedrow/pymemcache,sontek/pymemcache,dive-tv/pyelasticache_client,mbrukman/pymemcache,pinterest/pymemcache,sontek/pymemcache