client: Fix errors.New() arguments.
client: Fix errors.New() arguments.

CI failed because of "too many arguments in call to errors.New".

Fixes: b02798bdeab ("client: make "invalid Database Schema" message more informative")
Signed-off-by: Han Zhou <48856d607c7ad215303ff62bd19d4664adb69eb0@ebay.com>

socketplane/libovsdb