Adding tests for custom user agent
Adding tests for custom user agent

dionjwa/pkgcloud,temka1234/pkgcloud,andrewsomething/pkgcloud,Phanatic/pkgcloud,DonSchenck/pkgcloud,hacor/pkgcloud,bunglestink/pkgcloud,Phanatic/pkgcloud,apla/pkgcloud,mdsummers/pkgcloud,mcanthony/pkgcloud,songanbui/pkgcloud,pkgcloud/pkgcloud,Hopebaytech/pkgcloud