orc tests: don't set DbName for tests that don't need it. disable TER test until it can be made reliable
orc tests: don't set DbName for tests that don't need it. disable TER test until it can be made reliable

Signed-off-by: deepthi <3f83f38ad2e2ddcc47e21eb12a05ce66eb4cf525@planetscale.com>

mahak/vitess,tinyspeck/vitess,tinyspeck/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,tinyspeck/vitess,mahak/vitess,tinyspeck/vitess,tinyspeck/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,tinyspeck/vitess,mahak/vitess,mahak/vitess,tinyspeck/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess