[tests] verbose in travis
[tests] verbose in travis

mikecroucher/GPy,avehtari/GPy,SheffieldML/GPy,esiivola/GPYgradients,esiivola/GPYgradients,avehtari/GPy,befelix/GPy,SheffieldML/GPy,esiivola/GPYgradients,dhhjx880713/GPy,ysekky/GPy,ysekky/GPy,mikecroucher/GPy,ysekky/GPy,dhhjx880713/GPy,SheffieldML/GPy,avehtari/GPy,SheffieldML/GPy,mikecroucher/GPy,dhhjx880713/GPy,befelix/GPy,befelix/GPy,ysekky/GPy,avehtari/GPy,dhhjx880713/GPy,mikecroucher/GPy,befelix/GPy,esiivola/GPYgradients