do not break arguments with spaces inside (#1095)

Fix #1094

Author: yanns

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

@@ -55,4 +55,4 @@ ${{template_declares}}
 # If a configuration file exist, read the contents to $opts
 [ -f "$script_conf_file" ] && opts=$(loadConfigFile "$script_conf_file")
 
-exec java $java_opts -classpath $app_classpath $opts $app_mainclass $@
+exec java $java_opts -classpath $app_classpath $opts $app_mainclass "$@"