VoiceData.Exception: use AssertionError instead of Exception to get the language in the JUnit results.

android/eSpeakTests/src/com/reecedunn/espeak/test/SpeechSynthesisTest.java

                 assertThat(voice.locale.getVariant(), is(data.variant));
                 assertThat(voice.toString(), is(data.name));
             }
-            catch (Exception e)
+            catch (AssertionError e)
             {
                 throw new VoiceData.Exception(data, e);
             }

android/eSpeakTests/src/com/reecedunn/espeak/test/TextToSpeechTest.java

                 assertThat(mEngine.getLanguage().getCountry(), is(""));
                 assertThat(mEngine.getLanguage().getVariant(), is(""));
             }
-            catch (Exception e)
+            catch (AssertionError e)
             {
                 throw new VoiceData.Exception(data, e);
             }

android/eSpeakTests/src/com/reecedunn/espeak/test/VoiceData.java

     {
         private static final long serialVersionUID = 1L;
 
-        public Exception(Voice voice, java.lang.Exception context)
+        public Exception(Voice voice, AssertionError context)
         {
             super("Voice \"" + voice.name + "\" -- " + context);
         }