[SQL] logWarning should be logInfo in getResultSetSchema

Author: wangfei <wangfei_hello@126.com>

Closes #1939 from scwf/patch-5 and squashes the following commits:

f952d10 [wangfei] [SQL] logWarning should be logInfo in getResultSetSchema

(cherry picked from commit 507a1b520063ad3e10b909767d9e3fd72d24415b)
Signed-off-by: Michael Armbrust <michael@databricks.com>