Allow to provide custom kubectl config

Allows to connect to any cluster, not just local one.

Change-Id: I75f17ac26a72d7f9ef555e53d3bbe6a08beec15d
diff --git a/metadata/service/client.yml b/metadata/service/client.yml
index 512e99a..1822dd8 100644
--- a/metadata/service/client.yml
+++ b/metadata/service/client.yml
@@ -18,5 +18,8 @@
         download_url: https://dl.k8s.io/v1.6.7/kubernetes-client-linux-amd64.tar.gz
         download_hash: sha256=54947ef84181e89f9dbacedd54717cbed5cc7f9c36cb37bc8afc9097648e2c91
         tarball_path: kubernetes/client/bin/kubectl
+        config:
+          cluster: {}
+          user: {}
       repos: {}
       releases: {}