Add help / version output jni test

tests/jni

@@ -77,5 +77,13 @@ test_NullArg() {
    assertStderrGrep 'NullPointerException: null element in argv'
 }
 
+doc_help="Serval JNI returns help text"
+test_help() {
+   execute --core-backtrace java "-Djava.library.path=$LD_LIBRARY_PATH" -classpath "$PWD/classes" org.servalproject.servald.ServalD 'help'
+   tfw_cat --stdout --stderr
+   assertExitStatus '==' 0
+   assertStdoutGrep 'Serval DNA version '
+}
+
 
 runTests "$@"