migrate to dhtnet namespace

Change-Id: I7143a010bd83e8cfa7a3c8c3072ed23f6f0ba8e3
diff --git a/src/ice_transport_factory.h b/src/ice_transport_factory.h
index 97a2194..0292192 100644
--- a/src/ice_transport_factory.h
+++ b/src/ice_transport_factory.h
@@ -31,7 +31,7 @@
 #include <memory>
 #include <vector>
 
-namespace jami {
+namespace dhtnet {
 
 class IceTransportFactory
 {