fixing error related to install codecove in travis (#7940)
fixing error related to install codecove in travis (#7940)


zhouyao1994/incubator-superset,airbnb/caravel,mistercrunch/panoramix,apache/incubator-superset,apache/incubator-superset,airbnb/superset,mistercrunch/panoramix,zhouyao1994/incubator-superset,mistercrunch/panoramix,apache/incubator-superset,airbnb/caravel,zhouyao1994/incubator-superset,apache/incubator-superset,airbnb/superset,airbnb/caravel,zhouyao1994/incubator-superset,airbnb/superset,airbnb/superset,zhouyao1994/incubator-superset,mistercrunch/panoramix,apache/incubator-superset,airbnb/caravel