Presenting upstream feature for nginx

With this feature you will be able to set up nginx load balancer

Change-Id: Ib6628828a7c197b9fff4409e109f45324ccc9e34
diff --git a/tests/pillar/proxy.sls b/tests/pillar/proxy.sls
index 934c4e6..959c9c9 100644
--- a/tests/pillar/proxy.sls
+++ b/tests/pillar/proxy.sls
@@ -25,6 +25,14 @@
     bind:
       address: 127.0.0.1
       protocol: tcp
+    upstream:
+      horizon-upstream:
+        backend1:
+          address: 10.10.10.113
+          port: 8078
+          opts: weight=3
+        backend2:
+          address: 10.10.10.114
     site:
       nginx_proxy_site01:
         enabled: true
@@ -37,4 +45,12 @@
         host:
           name: cloudlab.domain.com
           port: 80
-
+      nginx_proxy_site02:
+        enabled: true
+        type: nginx_proxy
+        name: site02
+        proxy:
+          upstream_proxy_pass: http://horizon-upstream
+        host:
+          name: cloudlab.domain.com
+          port: 31337