Adding ability to run smoke test in multinode

The patch adds ability to run smoke tests in multinode for
that below actions have been:

* copy tempest config from config node to test_target
* send keystonerc file to mine from control node
* put keystonerc from mine to test_target

Change-Id: Ifb8555e0526daa5e32c46fbac518ef45ca4ad1ef
Related-PROD: PROD-18350
diff --git a/README.rst b/README.rst
index 4d24d42..5df03f5 100644
--- a/README.rst
+++ b/README.rst
@@ -12,6 +12,8 @@
 
 .. code-block:: yaml
   runtest:
+    keystonerc_node: ctl01*
+    test_target: gtw01*
     artifact_collector:
       enabled: true
       artifactory: