1. Validate Visual Query is working given a working configuration for spark shell server mode, such as:
2. Change spark.shell.server.host to a bad value, such as 'local'
3. run visual query again, after choosing a table and pressing continue to 'step 3'
4. note the followng error:
and note logs for kylo-services and kylo-ui do not elaborate.
A more meaningful error message explaining that the spark shell in server mode is not reachable
NOTE: it is not necessary to have spark shell running in server mode via `/opt/kylo/kylo-services/bin/run-kylo-spark-shell.sh` to demonstrate this error as kylo-services can never connect.