CcnxConsumerCbr now is really CBR (no randomization).

Several corrections in blackhole-sprint scenario.
diff --git a/apps/ccnx-consumer.cc b/apps/ccnx-consumer.cc
index 6fc3a40..28dc23e 100644
--- a/apps/ccnx-consumer.cc
+++ b/apps/ccnx-consumer.cc
@@ -112,7 +112,7 @@
 {
   NS_LOG_FUNCTION_NOARGS ();
   
-  m_rtt = CreateObject<RttMeanDeviation> (); 
+  m_rtt = CreateObject<RttMeanDeviation> ();
 }
 
 void