Correct codestyle.sh

Signed-off-by: Etienne CHAMPETIER <etienne.champetier@fiducial.net>
Split codestyle checks in mandatory and optionnal tests
visibility fixer is making some false positive

Signed-off-by: Etienne CHAMPETIER <etienne.champetier@fiducial.net>
Merge pull request #280 from echampet/codestyle.sh

Rework codestyle.sh