cmd/server sets now environment variables KAPOW_DATA_URL and KAPOW_CONTROL_URL

Remove golinter error S1036: unnecessary guard around map access in 
spawn package

internal/server/user/spawn/spawn_test.go

@@ -94,6 +94,8 @@ func TestSpawnWritesToStdout(t *testing.T) {
 }
 
 func TestSpawnSetsKapowURLEnvVar(t *testing.T) {
+	t.Skip("Not neccessary as this variable is now set by server at start up")
+
 	h := &model.Handler{
 		Route: model.Route{
 			Entrypoint: locateJailLover(),