adding memcache to travis
adding memcache to travis

unicefuganda/uSurvey,unicefuganda/uSurvey,antsmc2/mics,antsmc2/mics,antsmc2/mics,unicefuganda/uSurvey,unicefuganda/mics,unicefuganda/mics,unicefuganda/mics,unicefuganda/uSurvey,unicefuganda/uSurvey