Use new core network class in Iperf()/Iperf2_Unidir()/Ping()

Use the core network class to configure one "end" of these tests. This
will make the tests more generic and predictable, as they are explicitly
configured through two ci_infra.yaml "entities", instead of some
implicit "EPC" IP address given in configuration.

As of this commit, no XML passes this info into the framework, so no XML
step will work. As it is many changes, the following commits will add
the necessary info one by one.

ci-scripts/main.py

@@ -242,6 +242,7 @@ def ExecuteActionWithParam(action):
 		CiTestObj.ping_args = test.findtext('ping_args')
 		CiTestObj.ping_packetloss_threshold = test.findtext('ping_packetloss_threshold')
 		CiTestObj.ue_ids = test.findtext('id').split(' ')
+		CiTestObj.svr_id = test.findtext('svr_id') or None
 		if force_local:
 			# Change all execution targets to localhost
 			CiTestObj.nodes = ['localhost'] * len(CiTestObj.ue_ids)
@@ -254,7 +255,7 @@ def ExecuteActionWithParam(action):
 			else:
 				CiTestObj.nodes = [None] * len(CiTestObj.ue_ids)
 		ping_rttavg_threshold = test.findtext('ping_rttavg_threshold') or ''
-		success = CiTestObj.Ping(HTML,EPC,CONTAINERS)
+		success = CiTestObj.Ping(HTML, CONTAINERS)
 
 	elif action == 'Iperf' or action == 'Iperf2_Unidir':
 		CiTestObj.iperf_args = test.findtext('iperf_args')
@@ -285,9 +286,9 @@ def ExecuteActionWithParam(action):
 			logging.error('test-case has wrong option ' + CiTestObj.iperf_options)
 			CiTestObj.iperf_options = 'check'
 		if action == 'Iperf':
-			success = CiTestObj.Iperf(HTML, EPC, CONTAINERS)
+			success = CiTestObj.Iperf(HTML, CONTAINERS)
 		elif action == 'Iperf2_Unidir':
-			success = CiTestObj.Iperf2_Unidir(HTML, EPC, CONTAINERS)
+			success = CiTestObj.Iperf2_Unidir(HTML, CONTAINERS)
 
 	elif action == 'IdleSleep':
 		st = test.findtext('idle_sleep_time_in_sec') or "5"