Merge topic 'tests-no-c++98' 61bea8f3c8 Tests: Remove incidental use of C++98 compiler modes 02ec5c4ad2 Tests: Add missing include in sleep sources Acked-by: Kitware Robot <kwrobot@kitware.com> Tested-by: buildbot <buildbot@kitware.com> Reviewed-by: Raul Tambre <raul@tambre.ee> Merge-request: !7206