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/cls_module.py

@@ -62,9 +62,6 @@ class Module_UE:
 			self.trace = m.get('trace') == True
 			self.logStore = m.get('LogStore')
 			self.cmd_prefix = m.get('CmdPrefix')
-			self.runIperf3Server = m.get('RunIperf3Server', True)
-			self.namespace = m.get('Namespace')
-			self.cnPath = m.get('CNPath')
 			logging.info(f'initialized UE {self} from {filename}')
 
 	def __str__(self):
@@ -190,15 +187,6 @@ class Module_UE:
 	def getHost(self):
 		return self.host
 
-	def getNamespace(self):
-		return self.namespace
-
-	def getCNPath(self):
-		return self.cnPath
-
-	def getRunIperf3Server(self):
-		return self.runIperf3Server
-
 	def getCmdPrefix(self):
 		return self.cmd_prefix if self.cmd_prefix else ""