Cleanup for using cord-tester logger over scapy logger which was an ugly hack.

Change-Id: I8af565f8eb4f69ddc6605e717a0c83772cc9417f
diff --git a/src/test/iperf/iperfTest.py b/src/test/iperf/iperfTest.py
index a90f048..d6bc737 100644
--- a/src/test/iperf/iperfTest.py
+++ b/src/test/iperf/iperfTest.py
@@ -23,7 +23,8 @@
 from nose.twistedtools import reactor, deferred
 from twisted.internet import defer
 from OnosCtrl import OnosCtrl
-from scapy.all import *
+from CordTestUtils import log_test as log
+
 log.setLevel('INFO')
 
 class iperf_exchange(unittest.TestCase):
@@ -200,4 +201,3 @@
             df.callback(0)
         reactor.callLater(0, iperf_network_test, df)
         return df
-