[tests][barnes] Bugfix to the barnes benchmark
[tests][barnes] Bugfix to the barnes benchmark

victorisildur/Graphite,8l/Graphite,victorisildur/Graphite,8l/Graphite,nkawahara/Graphite,mit-carbon/Graphite,nkawahara/Graphite,8l/Graphite,mit-carbon/Graphite,nkawahara/Graphite,fhijaz/Graphite,fhijaz/Graphite,mit-carbon/Graphite,fhijaz/Graphite,nkawahara/Graphite,mit-carbon/Graphite,fhijaz/Graphite,victorisildur/Graphite,8l/Graphite,victorisildur/Graphite