Fix failing tests (most of them), get basic features working with Solidus

[fredericboivin]

1. Adapted the overrides to fit with the Solidus layout instead of Spree 3
2. Remove code related to localized cart link (not needed with the latest Solidus master, cart link is smart about it)

This fix mosts of the failing spec except those from this file :

scenario 'selected translation is applied'
scenario 'JS cart link is translated'

cc: @jhawthorn for failing capybara spec

Point to consider

The cart_decorator.js.coffee is there as a bandaid for Solidus 1.0 since the exact same code is present in Solidus master but not on Solidus v1, would it be a good idea to backport the change in Solidus 1.0?

After this, the extension should be passing tests and providing the necessary features so we can move forward with Globalize

TO DO

Analyze how we want to handle the differents upgrade paths because the included migrations could be problematic and might be not something we want to support forever (relating to dropping the translations table or not)

[fredericboivin]

Test suite is now green

At this point the goal was strictly to port the extension so design is unchanged

1. There is a locale controller in Solidus which looks like dead code : Solidus

It's monkey patch by the extension, it might cleaner to remove it from the core and define it properly in this extension

2. The JS needed to localize cart_link is in the core for v.1.1 and master but not v.1.0 so it's included as a decorator in the extension since it rely on it: cart_decorator.js

3. I added some regex in the spec because Capybara and the tests in the first comment are failing because it expect lower case while in the page it's uppercase

cc: @jhawthorn for review

Once everything is ready, I suggest publishing a stable v1.0 branch and keeping master for active development

[tvdeyen]

👍 Thanks!

[tvdeyen]

I suggest to make the version match the solidus version. So 1.1.0 as this is the current release of solidus. Maybe make a 1.0 branch without the cart link?

[tvdeyen]

ping @alepore

[fredericboivin]

Gemfile had Solidus master instead of v.1.0 so tests were passing even though the _cart_link html was missing a param. V.1.0 needs an additional override added by #8e97b6aad

Not sure why Ruby 2.2. with Postgres is failing though, investigating

EDIT : Restarted the Travis build, now passing, not sure why it failed the first time (maybe just an error during the build?)