Gian Merlino 80173b5d29 SQL: Set INFORMATION_SCHEMA catalog name to "druid". (#6595)
* SQL: Set INFORMATION_SCHEMA catalog name to "druid".

Some third party tools ignore catalogs with empty names. So using
the name "druid" for the catalog makes integration easier.

* Update tests.
2018-11-14 06:32:40 +08:00
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