SEC-2914 fix missing snippet tag

Author: colmenero

examples/connext_secure/cds/c++11/USER_QOS_PROFILES.xml

@@ -19,6 +19,8 @@ to use the software. -->
     <qos_library name="library_cds">
 
         <qos_profile name="insecure_snippet">
+            <?rti-qos_snippet?>
+
             <domain_participant_qos>
                 <transport_builtin>
                     <mask>UDPv4</mask>