Tweak some stdlib usage so we compile under Go 1.14.

Mainly, avoid using some `testing` helpers that were added in 1.14, as well as a couple of other niceties we can live without.

Signed-off-by: Matt Moyer <moyerm@vmware.com>

internal/fosite/authorizationcode/authorizationcode_test.go

@@ -58,16 +58,15 @@ func TestAuthorizeCodeStorage(t *testing.T) {
 				request := &fosite.AuthorizeRequest{
 					ResponseTypes: fosite.Arguments{"not-code"},
 					RedirectURI: &url.URL{
-						Scheme:      "",
-						Opaque:      "weee",
-						User:        &url.Userinfo{},
-						Host:        "",
-						Path:        "/callback",
-						RawPath:     "",
-						ForceQuery:  false,
-						RawQuery:    "",
-						Fragment:    "",
-						RawFragment: "",
+						Scheme:     "",
+						Opaque:     "weee",
+						User:       &url.Userinfo{},
+						Host:       "",
+						Path:       "/callback",
+						RawPath:    "",
+						ForceQuery: false,
+						RawQuery:   "",
+						Fragment:   "",
 					},
 					State:                "stated",
 					HandledResponseTypes: fosite.Arguments{"not-type"},