HIVE-28349: SHOW TABLES with invalid connector, giving 0 results, ins…

[saihemanth-cloudera]

…tead of failing

What changes were proposed in this pull request?

For remote databases, if the connector URL is invalid, then throw an exception instead of empty results.

Why are the changes needed?

Much easier for end-user to understand the issue if there is a problem with connectivity.

Does this PR introduce any user-facing change?

No

Is the change a dependency upgrade?

No

How was this patch tested?

Local cluster.