Merge "Improve "get_server" function in Kubernetes context"

diff --cc yardstick/benchmark/contexts/kubernetes.py
index 52d17df,9feb006..a6b3eba
--- 1/yardstick/benchmark/contexts/kubernetes.py
--- 2/yardstick/benchmark/contexts/kubernetes.py
+++ b/yardstick/benchmark/contexts/kubernetes.py
@@@ -13,9 -14,10 +13,11 @@@ import pkg_resource
  
  import paramiko
  
 +from yardstick.benchmark import contexts
  from yardstick.benchmark.contexts.base import Context
  from yardstick.orchestrator import kubernetes
+ from yardstick.common import constants
+ from yardstick.common import exceptions
  from yardstick.common import kubernetes_utils as k8s_utils
  from yardstick.common import utils
  

diff --cc yardstick/tests/unit/benchmark/contexts/test_kubernetes.py
index 941d50e,512468f..b070b24
--- 1/yardstick/tests/unit/benchmark/contexts/test_kubernetes.py
--- 2/yardstick/tests/unit/benchmark/contexts/test_kubernetes.py
+++ b/yardstick/tests/unit/benchmark/contexts/test_kubernetes.py
@@@ -10,9 -10,9 +10,10 @@@
  import mock
  import unittest
  
 +from yardstick.benchmark import contexts
  from yardstick.benchmark.contexts import base
  from yardstick.benchmark.contexts import kubernetes
+ from yardstick.common import constants
  from yardstick.orchestrator import kubernetes as orchestrator_kubernetes