6294 - Trivial updates to mc getting started guide + example config file

Change password in example file to match the text in the Getting Started (with Redhat) document

Signed-off-by: R.I.Pienaar <rip@devco.net>

ext/activemq/examples/single-broker/activemq.xml

@@ -15,7 +15,7 @@
           <statisticsBrokerPlugin/>
           <simpleAuthenticationPlugin>
             <users>
-              <authenticationUser username="mcollective" password="example" groups="mcollective,everyone"/>
+              <authenticationUser username="mcollective" password="marionette" groups="mcollective,everyone"/>
               <authenticationUser username="admin" password="secret" groups="mcollective,admin,everyone"/>
             </users>
           </simpleAuthenticationPlugin>