Fix Connector tests
Fix Connector tests

backported from 60bed0165b6f51c3425582e5fe67bfe13410e0e1
* Adapt SQL execute mockups to new specification
* Wipe app_config connectors configuration for tests

CartoDB/cartodb,CartoDB/cartodb,CartoDB/cartodb,splashblot/dronedb,splashblot/dronedb,CartoDB/cartodb,CartoDB/cartodb,splashblot/dronedb,splashblot/dronedb,splashblot/dronedb