When giving up PIT entry, remove all outgoing interests. Otherwise,
everything can stuck (was happening...)

Modified experiment with synthetic topology
diff --git a/model/ccnx-face.cc b/model/ccnx-face.cc
index 3e39384..18b2015 100644
--- a/model/ccnx-face.cc
+++ b/model/ccnx-face.cc
@@ -112,7 +112,7 @@
   
   if (m_bucketMax > 0)
     {
-      //NS_LOG_DEBUG ("Limits enabled: " << m_bucketMax << ", current: " << m_bucket);
+      NS_LOG_DEBUG ("Limits enabled: " << m_bucketMax << ", current: " << m_bucket);
       if (m_bucket+1.0 > m_bucketMax)
         {
           //NS_LOG_DEBUG ("Returning false");