Create data directory for am and prometheus

Change-Id: Ie89009480c06cafb15bb06ded263e49ef194dfc9
diff --git a/tests/pillar/alertmanager.sls b/tests/pillar/alertmanager.sls
index 092e788..d22c28f 100644
--- a/tests/pillar/alertmanager.sls
+++ b/tests/pillar/alertmanager.sls
@@ -2,7 +2,8 @@
   alertmanager:
     enabled: true
     dir:
-      config: /srv/volumes/prometheus
+      config: /srv/volumes/prometheus/alertmanager
+      data: /srv/volumes/local/prometheus/alertmanager
     bind:
       address: 0.0.0.0
       port: 9093
@@ -45,4 +46,4 @@
       - 127.0.0.1
     log:
       engine: json-file
-      size: 50m
\ No newline at end of file
+      size: 50m