update manual for SetGroupName

doc/manual/source/attributes.rst

@@ -165,6 +165,7 @@ This is defined in the ``node.cc`` file as follows::
     {
       static TypeId tid = TypeId ("ns3::Node")
         .SetParent<Object> ()
+        .SetGroupName ("Network")
         .AddConstructor<Node> ()
         .AddAttribute ("DeviceList",
 	               "The list of devices associated to this Node.",
@@ -300,6 +301,7 @@ registrations are moved into the :cpp:class:`TypeId` class; *e.g*.::
     {
       static TypeId tid = TypeId ("ns3::DropTailQueue")
         .SetParent<Queue> ()
+        .SetGroupName ("Network")
         .AddConstructor<DropTailQueue> ()
         .AddAttribute ("MaxPackets", 
                        "The maximum number of packets accepted by this DropTailQueue.",

doc/manual/source/new-models.rst

@@ -341,6 +341,7 @@ file.::
     {
       static TypeId tid = TypeId ("ns3::ErrorModel")
         .SetParent<Object> ()
+        .SetGroupName ("Network")
         ;
       return tid;
     }
@@ -359,6 +360,7 @@ file.::
     {
       static TypeId tid = TypeId ("ns3::RateErrorModel")
         .SetParent<ErrorModel> ()
+        .SetGroupName ("Network")
         .AddConstructor<RateErrorModel> ()
         ;
       return tid;
@@ -556,6 +558,7 @@ and setting the Parent to ErrorModel::
     {
       static TypeId tid = TypeId ("ns3::RateErrorModel")
         .SetParent<ErrorModel> ()
+        .SetGroupName ("Network")
         .AddConstructor<RateErrorModel> ()
       ...
 

doc/manual/source/random-variables.rst

@@ -277,6 +277,7 @@ An example is in the propagation models for WifiNetDevice::
     { 
       static TypeId tid = TypeId ("ns3::RandomPropagationDelayModel")
         .SetParent<PropagationDelayModel> ()
+        .SetGroupName ("Propagation")
         .AddConstructor<RandomPropagationDelayModel> ()
         .AddAttribute ("Variable",
                        "The random variable which generates random delays (s).",