fix: Test connection before starting on create transaction (#15100)
fix: Test connection before starting on create transaction (#15100)

* test connection before starting on create transaction

* Update create.py
airbnb/caravel,zhouyao1994/incubator-superset,apache/incubator-superset,mistercrunch/panoramix,zhouyao1994/incubator-superset,airbnb/caravel,apache/incubator-superset,zhouyao1994/incubator-superset,zhouyao1994/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,mistercrunch/panoramix,airbnb/caravel,mistercrunch/panoramix,apache/incubator-superset,mistercrunch/panoramix,apache/incubator-superset,airbnb/caravel