SMX4KNL-201: the client jar does not exit when running with --help argument

git-svn-id: https://svn.apache.org/repos/asf/servicemix/smx4/kernel/trunk@745466 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/client/src/main/java/org/apache/servicemix/kernel/client/Main.java b/client/src/main/java/org/apache/servicemix/kernel/client/Main.java
index b6c66a0..8f8c1d1 100644
--- a/client/src/main/java/org/apache/servicemix/kernel/client/Main.java
+++ b/client/src/main/java/org/apache/servicemix/kernel/client/Main.java
@@ -50,6 +50,7 @@
                     System.out.println("  --help        shows this help message");
                     System.out.println("  [commands]    commands to run");
                     System.out.println("If no commands are specified, the client will be put in an interactive mode");
+                    System.exit(0);
                 } else {
                     System.err.println("Unknown option: " + args[i]);
                     System.err.println("Run with --help for usage");