Remove address_type and rename phone to phone_address

An event can indeed have several address types

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

priv/repo/migrations/20190114162055_remove_address_type.exs

@@ -0,0 +1,11 @@
+defmodule Mobilizon.Repo.Migrations.RemoveAddressType do
+  use Ecto.Migration
+
+  def up do
+    alter table(:events) do
+      remove(:address_type)
+    end
+    execute "DROP TYPE address_type"
+    rename table(:events), :phone, to: :phone_address
+  end
+end