Implement missing add_residual function

Author: gregsymons

src/main/resources/com/typesafe/sbt/packager/archetypes/scripts/ash-template

@@ -32,6 +32,10 @@ addJava () {
   java_opts="$java_opts $1"
 }
 
+addResidual () {
+  residual_args="$residual_args $1"
+}
+
 # Allow user to specify java options. These get listed first per bash-template.
 if [ -n "$JAVA_OPTS" ]
 then
@@ -87,6 +91,7 @@ process_args () {
   fi
 }
 
+residual_args=""
 real_script_path="$(realpath "$0")"
 app_home="$(realpath "$(dirname "$real_script_path")")"
 lib_dir="$(realpath "${app_home}/../lib")"
@@ -102,4 +107,4 @@ java_cmd="$(get_java_cmd)"
 # If a configuration file exist, read the contents to $opts
 [ -f "$script_conf_file" ] && opts=$(loadConfigFile "$script_conf_file")
 
-exec "$java_cmd" $java_opts -classpath $app_classpath $opts $app_mainclass "$@"
+exec "$java_cmd" $java_opts -classpath $app_classpath $opts $app_mainclass "$residual_args"