Add go's binpath when running system test.
Add go's binpath when running system test.

gdbdzgd/aptly,gearmover/aptly,smira/aptly,sobczyk/aptly,smira/aptly,scalp42/aptly,gearmover/aptly,adfinis-forks/aptly,aptly-dev/aptly,ceocoder/aptly,aptly-dev/aptly,gdbdzgd/aptly,bankonme/aptly,ceocoder/aptly,jola5/aptly,gearmover/aptly,aptly-dev/aptly,smira/aptly,jola5/aptly,vincentbernat/aptly,bsundsrud/aptly,gdbdzgd/aptly,vincentbernat/aptly,neolynx/aptly,scalp42/aptly,adfinis-forks/aptly,sobczyk/aptly,bankonme/aptly,vincentbernat/aptly,sobczyk/aptly,bsundsrud/aptly,scalp42/aptly,neolynx/aptly,ceocoder/aptly,neolynx/aptly,adfinis-forks/aptly,bsundsrud/aptly,seaninspace/aptly,seaninspace/aptly,bankonme/aptly,seaninspace/aptly,jola5/aptly