Tests that need a lookup answer give it an hour (closes #119)

Twelve tests in internal/proxy needed the GeoJS stand-in to be asked or
to answer within the default SWWAF_LOOKUP_TIMEOUT of one second on the
real clock. A hold-up of the test process past it abandoned the request
to the stand-in, or left the client unknown. Each now sets
SWWAF_LOOKUP_TIMEOUT to an hour, and the comment on startGeoJS asks the
same of later tests.

Judgement call: set in each test, not as a default in newProxy, where it
would change two tests that rely on the default second.

Model: opus-5-5

internal/proxy/errorburst_test.go

@@ -194,6 +194,7 @@ func TestErrorBurstIsNotLoweredForAClientWithLowerLimits(t *testing.T) {
 
 	geojsURL, _ := startGeoJS(t)
 	s, _, server := startWithClock(t, geojsURL, map[string]string{
+		lookupTimeout:       "1h",
 		errorBurstThreshold: "2",
 		rulesDir:            writeRules(t, testRules),
 		countryLimitPercent: countryDEHalf,