Minor fixes for test_k8s_chain_update

Fix downloading path of combined xml report and
add sleep() to prevent network collapse on ctl01

Change-Id: If9a3f275a5ac8d74660b90fd981937f2d1d69e3b
Related-PROD: PROD-20720
diff --git a/tcp_tests/tests/system/test_k8s_actions.py b/tcp_tests/tests/system/test_k8s_actions.py
index a8dbe72..ab57efc 100644
--- a/tcp_tests/tests/system/test_k8s_actions.py
+++ b/tcp_tests/tests/system/test_k8s_actions.py
@@ -13,6 +13,7 @@
 #    under the License.
 
 import pytest
+import time
 
 from tcp_tests import logger
 from tcp_tests import settings
@@ -106,6 +107,9 @@
         sample_service_ip = k8s_deployed.get_svc_ip(deployment_name, 'default')
         k8s_deployed.wait_deploy_ready(deployment_name)
 
+        # workaround for PROD-20720
+        time.sleep(30)
+
         def check_is_test_service_available():
             assert "Hello Kubernetes!" in k8s_deployed.curl(
                 "http://{}:{}".format(sample_service_ip, 8080))