Bug 24191: Regression tests

Bug 24191: Regression tests

This patch adds missing tests for calling objects.search with
non-existent column names for sorting, that should be mapped using
to_model for that matter.

Tests should fail as there's no current use of to_model for building the
order_by portion of the query.

Sponsored-by: ByWater Solutions
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Joy Nelson <joy@bywatersolutions.com>