[.travis.yml] Use xcpretty instead of xctool
[.travis.yml] Use xcpretty instead of xctool

ideo-digital-shop/DryDock-iOS,ideo-digital-shop/DryDock-iOS,ideo-digital-shop/DryDock-iOS,ideo-digital-shop/DryDock-iOS,venmo/DryDock-iOS