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/rpr220/javaupm_rpr220.i

@@ -1,12 +1,7 @@
-%module(directors="1") javaupm_rpr220
+%module javaupm_rpr220
 %include "../upm.i"
 
 
-%feature("director") IsrCallback;
-SWIG_DIRECTOR_OWNED(IsrCallback)
-%ignore generic_callback_isr;
-%include "../IsrCallback.h"
-
 %{
     #include "rpr220.h"
 %}
@@ -21,4 +16,4 @@ SWIG_DIRECTOR_OWNED(IsrCallback)
             System.exit(1);
         }
     }
-%}
+%}