allow retries of unit test so that transient errors don't fail the entire build
allow retries of unit test so that transient errors don't fail the entire build

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

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