Revert "Tryout different postgres version for travis"
Revert "Tryout different postgres version for travis"

This reverts commit 763d36e28fc4c926a5d1e1f69620fd60f98ed723.

rails-girls-summer-of-code/rgsoc-teams,TeamCheesy/rgsoc-teams,rails-girls-summer-of-code/rgsoc-teams,TeamCheesy/rgsoc-teams,rails-girls-summer-of-code/rgsoc-teams,TeamCheesy/rgsoc-teams