nitester: keep Jenkin's xml files in a common directory

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
nitester: do not use -j1 because it is not recognised by niti

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
nitester: do not use nit copy dir, it doesn't affect performance

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
nitester: set packet size to a single test

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
nitester: order tasks per test before engine for a better distribution

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
nitester: support todo and skip exec test results

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
nitester: fix bug where nodes worked on one more task per packet

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
nitester: use a hashed filename for produced xml files to avoid conflicts

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
jenkins: add the nitester-wrapper script

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