Make context types constants

Make context types constants. These are the current context types:
  - Dummy
  - Heat
  - Kubernetes
  - Node
  - StandaloneOvsDpdk
  - StandaloneSriov

Any reference to a context type should use the referred constant.

JIRA: YARDSTICK-1292

Change-Id: I1ff0085161f88304d71e3ddad7975f9020e0fc20
Signed-off-by: Rodolfo Alonso Hernandez <rodolfo.alonso.hernandez@intel.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/yardstick/benchmark/contexts/dummy.py b/yardstick/benchmark/contexts/dummy.py
index 36e8854e8..9faca4c63 100644
--- a/yardstick/benchmark/contexts/dummy.py
+++ b/yardstick/benchmark/contexts/dummy.py
@@ -7,17 +7,18 @@
 # http://www.apache.org/licenses/LICENSE-2.0
 ##############################################################################
 
-from yardstick.benchmark.contexts.base import Context
+from yardstick.benchmark import contexts
+from yardstick.benchmark.contexts import base
 
 
-class DummyContext(Context):
+class DummyContext(base.Context):
     """Class that handle dummy info.
 
     This class is also used to test the abstract class Context because it
     provides a minimal concrete implementation of a subclass.
     """
 
-    __context_type__ = "Dummy"
+    __context_type__ = contexts.CONTEXT_DUMMY
 
     def deploy(self):
         """Don't need to deploy"""