Hotfix - include correct file for multi site setup

Change-Id: Ie2aa746e23ce700a696f227ffe51828f61d878f0
diff --git a/horizon/server/init.sls b/horizon/server/init.sls
index 8b77234..081891d 100644
--- a/horizon/server/init.sls
+++ b/horizon/server/init.sls
@@ -1,7 +1,7 @@
 include:
 {%- if pillar.horizon.server.app is defined %}
 {# uglier way, for development #}
-- horizon.server.multi.service_git
+- horizon.server.multi.service
 - horizon.server.multi.site
 {%- else %}
 {# production way #}