Added bind info for pushgateway

Change-Id: Ib3b8e0ef15a864208e29df4b553fbde42882dc7c
diff --git a/tests/pillar/prometheus_pushgateway.sls b/tests/pillar/prometheus_pushgateway.sls
index 7921ba1..873daa2 100644
--- a/tests/pillar/prometheus_pushgateway.sls
+++ b/tests/pillar/prometheus_pushgateway.sls
@@ -1,3 +1,6 @@
 prometheus:
   pushgateway:
     enabled: true
+    bind:
+      address: 0.0.0.0
+      port: 9091