hcsr04: Made ISR be used internally and not be exposed to the user. Changed access modifier to private. Removed passing ISR to constructor.

Signed-off-by: Stefan Andritoiu <stefan.andritoiu@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/hcsr04/javaupm_hcsr04.i

@@ -1,11 +1,6 @@
 %module(directors="1") javaupm_hcsr04
 %include "../upm.i"
 
-%feature("director") IsrCallback;
-
-%ignore generic_callback_isr;
-%include "../IsrCallback.h"
-
 %{
     #include "hcsr04.h"
 %}
@@ -21,4 +16,5 @@
             System.exit(1);
         }
     }
-%}
+%}
+