Ensure PostgreSQL user is created for Geo installations

We had one customer use an external PostgreSQL server and activate the Geo
secondary server, and this did not create a `gitlab-psql` user by default.

Closes #2301

files/gitlab-cookbooks/gitlab-ee/recipes/geo-postgresql.rb

@@ -27,6 +27,8 @@ postgresql_username = account_helper.postgresql_user
 
 pg_helper = GeoPgHelper.new(node)
 
+include_recipe 'gitlab::postgresql_user'
+
 directory postgresql_dir do
   owner postgresql_username
   mode '0755'

spec/chef/gitlab-ee/recipes/geo-postgresql_spec.rb

@@ -35,6 +35,10 @@ describe 'geo postgresql 9.2' do
       expect(chef_run).to include_recipe('gitlab::postgresql-bin')
     end
 
+    it 'includes the postgresql_user recipe' do
+      expect(chef_run).to include_recipe('gitlab::postgresql_user')
+    end
+
     it 'creates the gitlab_geo role in the geo-postgresql database' do
       expect(chef_run).to create_postgresql_user('gitlab_geo')
     end