rproxy tests: give the over-1 MiB answers a 60 s time limit (closes #323)

TestAnAnswerThatCannotBePassedOnIsAnswered502 and
TestAnAnswerThatCannotBePassedOnGetsNoReport left SWRP_TIMEOUT_MS at its
default of 2 s. On a loaded host rproxy had not read the whole answer of
1 MiB and one byte within that time, so it used SWRP_DEFAULT_DISPOSITION
and the tests, which want 502, failed. Both now set SWRP_TIMEOUT_MS to
60000, as the file's other tests do where the time limit is not what they
test.

Model: opus-5-5

internal/rproxy/rproxy_test.go

@@ -1117,6 +1117,7 @@ func TestAnAnswerThatCannotBePassedOnIsAnswered502(t *testing.T) {
 					t.Error("the app was asked")
 				})
 				addr, out := startRProxy(t, backend(t), app.URL, map[string]string{
+					timeoutSetting:     "60000",
 					defaultDisposition: setting,
 				})
 
@@ -1140,7 +1141,9 @@ func TestAnAnswerThatCannotBePassedOnGetsNoReport(t *testing.T) {
 	t.Parallel()
 
 	standIn := startWAF(t, overOneMiB(dispositionDeny))
-	addr, out := startRProxy(t, standIn.URL, nowhere, nil)
+	addr, out := startRProxy(t, standIn.URL, nowhere, map[string]string{
+		timeoutSetting: "60000",
+	})
 
 	if got := get(t, addr, "/"); got.status != http.StatusBadGateway {
 		t.Errorf("answered %+v, want 502", got)