java: Use Runnables instead of IsrCallbacks in Java

Signed-off-by: Petre Eftime <petre.p.eftime@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/sx1276/javaupm_sx1276.i

@@ -1,4 +1,4 @@
-%module(directors="1") javaupm_sx1276
+%module javaupm_sx1276
 %include "../upm.i"
 %include "cpointer.i"
 %include "typemaps.i"

src/sx1276/sx1276.cxx

@@ -29,6 +29,10 @@
 #include <string>
 #include <string.h>
 
+#ifdef JAVACALLBACK
+#undef JAVACALLBACK
+#endif
+
 #include "sx1276.h"
 
 using namespace upm;