Switch maas to dockerized PostgreSQL

remove database port hardcode
extend tests with new port parameter
added backward compability for port parameter

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

Change-Id: Id25c30e1e9a2710c1567ffa10e453c1964c732da
diff --git a/tests/pillar/maas_region.sls b/tests/pillar/maas_region.sls
index d3325eb..668fc81 100644
--- a/tests/pillar/maas_region.sls
+++ b/tests/pillar/maas_region.sls
@@ -33,4 +33,5 @@
       name: maasdb
       password: password
       username: maas
+      port: 5432
     salt_master_ip: 127.0.0.1