Fix template_module header

- SubscriptionInterval.hpp includes Subscription.hpp, but not vice versa
- The time literal 1_s is defined in the namespace time_literals

src/templates/template_module/template_module.h

@@ -35,9 +35,11 @@
 
 #include <px4_platform_common/module.h>
 #include <px4_platform_common/module_params.h>
-#include <uORB/Subscription.hpp>
+#include <uORB/SubscriptionInterval.hpp>
 #include <uORB/topics/parameter_update.h>
 
+using namespace time_literals;
+
 extern "C" __EXPORT int template_module_main(int argc, char *argv[]);