Switch maas to dockerized PostgreSQL

db initialization change due to issue with syncdb mode with external
Postgresql in docker

Prod-related: PROD-25203  (PROD:25203)

Change-Id: I203e1faf2bf5f6367ce5535e0f2c4400b66455c9
diff --git a/maas/region.sls b/maas/region.sls
index 066490c..06d1970 100644
--- a/maas/region.sls
+++ b/maas/region.sls
@@ -133,7 +133,7 @@
 maas_region_syncdb:
   cmd.run:
   - names:
-    - maas-region syncdb --noinput
+    - maas-region dbupgrade
   - require:
     - file: /etc/maas/regiond.conf
   {%- if grains['saltversioninfo'][0] >= 2017 and grains['saltversioninfo'][1] >= 7 %}