Increase scrape interval/timeout for federation

For real environments 15s is not enough to scrape all data

Change-Id: Ibe966a2603d4e7b4ff6262a22524fda49da6cc6c
Closes-Bug: PROD-23870
diff --git a/prometheus/server/target/federation/init.yml b/prometheus/server/target/federation/init.yml
index 564af82..c480c1a 100644
--- a/prometheus/server/target/federation/init.yml
+++ b/prometheus/server/target/federation/init.yml
@@ -10,8 +10,8 @@
           prometheus_federation:
             honor_labels: true
             metrics_path: '/federate'
-            scrape_interval: 15s
-            scrape_timeout: 15s
+            scrape_interval: 30s
+            scrape_timeout: 30s
             endpoint:
              - address: ${_param:stacklight_monitor_address}
                port: 15010