Fixes #12011 - Replace .includes(table).where(table) by .eager_load

[dLobatog]

On Rails 3, .includes(:users).where("users.name = 'daniel'") works because
Rails would be smart enough to figure out the where query uses the includes
table. In this case it'd internally resolve it to eager_load to use the table
users in the query.

However on Rails 4 they decided they didn't want to maintain a parser for SQL,
so we have to append .references(:table) after every
.includes(:table).where("SQL that uses table").
This is not retrocompatible, but we can directly use eager_load on Rails 3 and
4 to avoid using .references.

[dLobatog]

Red because Gem::InstallError: fog-google requires Ruby version >= 2.0.

[dLobatog]

[test] now that fog-google is pinned

[dLobatog]

[test]

[shlomizadok]

Tested. Works well

[domcleal]

Merged as 7fdb705, thanks @elobato.