Adding kubernetes tests

Change-Id: Ibed1eadd12eef34cb9b810292913ad5bc8222b0b
Signed-off-by: Felipe Vicens <felipe.vicens@atos.net>
diff --git a/Dockerfile b/Dockerfile
index 05598fb..51f4c53 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -38,6 +38,9 @@
 # Folder where test results should be exported
 ENV ROBOT_REPORT_FOLDER=/robot-systest/results
 
+# Kubeconfig file
+ENV K8S_CREDENTIALS=/root/.kube/config
+
 ENV LC_ALL=C.UTF-8
 ENV LANG=C.UTF-8