Add support for running GitLab Geo tracking database

Secondary Geo Nodes will need a separate PostgreSQL tracking database to store progress. This MR depends on https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1197.

.gitignore

@@ -6,6 +6,7 @@
 /Procfile
 /postgresql/data
 /postgresql/.s.*
+/postgresql-geo/
 /postgresql-primary/
 /postgresql-replica/data
 /postgresql-replica/.s.*