Exclude Geo DB Yaml on CE too

For Geo, a file is created for configuration of the database. This file
shouldn't appear in CE, but if you've setup your GDK with a remote
pointing to CE and one to EE, this file might be around when switching
branches.

This will mark the workspace dirty, which annoys me more than it should.

[ci skip]

.gitignore

@@ -29,7 +29,7 @@ eslint-report.html
 /app/assets/javascripts/locale/**/app.js
 /backups/*
 /config/aws.yml
-/config/database.yml
+/config/database*.yml
 /config/gitlab.yml
 /config/gitlab_ci.yml
 /config/initializers/rack_attack.rb