refactored NodeData and NodeOptions to use server instead of emulation_server

daemon/examples/python/distributed_emane.py

@@ -34,7 +34,7 @@ def main(args):
     node_one = session.add_node(options=options)
     emane_net = session.add_node(_type=NodeTypes.EMANE)
     session.emane.set_model(emane_net, EmaneIeee80211abgModel)
-    options.emulation_server = server_name
+    options.server = server_name
     node_two = session.add_node(options=options)
 
     # create node interfaces and link

daemon/examples/python/distributed_lxd.py

@@ -24,7 +24,7 @@ def main(args):
     # create local node, switch, and remote nodes
     options = NodeOptions(image="ubuntu:18.04")
     node_one = session.add_node(_type=NodeTypes.LXC, options=options)
-    options.emulation_server = server_name
+    options.server = server_name
     node_two = session.add_node(_type=NodeTypes.LXC, options=options)
 
     # create node interfaces and link

daemon/examples/python/distributed_ptp.py

@@ -24,7 +24,7 @@ def main(args):
     # create local node, switch, and remote nodes
     options = NodeOptions()
     node_one = session.add_node(options=options)
-    options.emulation_server = server_name
+    options.server = server_name
     node_two = session.add_node(options=options)
 
     # create node interfaces and link

daemon/examples/python/distributed_switch.py

@@ -27,7 +27,7 @@ def main(args):
     node_one = session.add_node()
     switch = session.add_node(_type=NodeTypes.SWITCH)
     options = NodeOptions()
-    options.emulation_server = server_name
+    options.server = server_name
     node_two = session.add_node(options=options)
 
     # create node interfaces and link