Pull cord-tester images from dockerhub as they are available now on dockerhub.
Change image names to be compatible with dockerhub image names.
Update prerequisites.sh last step to pull all the cord-tester docker images.
This should make the cord-test.py build all step redundant now since images should be available for testing immediately after prerequisites.sh are run.

Change-Id: I64cf664a214924349d6728ca2a52974decdef47f
diff --git a/src/test/netCondition/netConditionTest.py b/src/test/netCondition/netConditionTest.py
index 5005772..15156d7 100644
--- a/src/test/netCondition/netConditionTest.py
+++ b/src/test/netCondition/netConditionTest.py
@@ -2162,7 +2162,7 @@
         threads = []
         threads_status = []
         clients = 1
-        radius_image = 'cord-test/radius:candidate'
+        radius_image = 'cordtest/radius:candidate'
         delay = 20
         que = Queue.Queue()
         def eap_tls_emulating_server_pkts(df):
@@ -2208,7 +2208,7 @@
         threads = []
         threads_status = []
         clients = 1
-        radius_image = 'cord-test/radius:candidate'
+        radius_image = 'cordtest/radius:candidate'
         delay = 20
         que = Queue.Queue()
         def tls_client_packets(start):
@@ -2412,4 +2412,3 @@
             df.callback(0)
         reactor.callLater(0, eap_tls_emulating_server_pkts, df)
         return df
-