fix: added meaningful exception for loading births error (#11407)
fix: added meaningful exception for loading births error (#11407)

* Added exception for loading data without previous loaded test users.

* Changed general exception to NoDataException

* Changed import to absolute path
mistercrunch/panoramix,apache/incubator-superset,zhouyao1994/incubator-superset,airbnb/caravel,apache/incubator-superset,zhouyao1994/incubator-superset,mistercrunch/panoramix,airbnb/caravel,apache/incubator-superset,apache/incubator-superset,airbnb/caravel,airbnb/caravel,mistercrunch/panoramix,zhouyao1994/incubator-superset,mistercrunch/panoramix,apache/incubator-superset,zhouyao1994/incubator-superset,zhouyao1994/incubator-superset