tests: wait until the res file exists before comparing it

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
tests: add a skip list for testing on the Turing cluster

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
nitester-wrapper: filter tests using turing.skip

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
nitester-wrapper: update script to follow the config of jenkins on pratchett

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>