Feature: Multilingual support

Require

https://github.com/ncbo/goo/pull/151

Context

The equivalent of https://github.com/ontoportal-lirmm/goo/pull/44, and implement better support of multilingual, giving the possibility to filter the fetched data from the triples store, to return only the ones matching one language (e.g fr for French), multiple languages (e.g en, fr for English and french), or all.

See the created tests for examples

Changes

Add multilingual support cases tests (https://github.com/ncbo/goo/pull/150/commits/e72d6438c47dca99826e6923bb42d9d8798ba2f1)
Add request store dependency to save globally the language per request (https://github.com/ncbo/goo/pull/150/commits/7215f496c1f6130768867725baa224077f16360a)
Add languages settings dsl to define the main language of the portal (https://github.com/ncbo/goo/pull/150/commits/d6e8c33e49f4b2168151c822a98eab62339a9f8a)
Create a module in SPARQL mixins to handle language filter logic (https://github.com/ncbo/goo/pull/150/commits/163a3de3ced136ed251735d58a0b58e1da9ed9b0)
Make map_attributes support multilingual (https://github.com/ncbo/goo/pull/150/commits/f34f2b08823a88bf0f83ddfb0deda9e7fbca83e8)

Codecov Report

Attention: Patch coverage is 89.92537% with 27 lines in your changes are missing coverage. Please review.

Project coverage is 87.05%. Comparing base (87e991b) to head (fb04e78). Report is 29 commits behind head on develop.

Files	Patch %	Lines
lib/goo/sparql/mixins/solution_lang_filter.rb	91.75%	8 Missing :warning:
lib/goo/base/resource.rb	75.00%	6 Missing :warning:
lib/goo.rb	61.53%	5 Missing :warning:
lib/goo/sparql/query_builder.rb	92.18%	5 Missing :warning:
lib/goo/sparql/solutions_mapper.rb	94.11%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #150 +/- ## =========================================== + Coverage 84.53% 87.05% +2.51% =========================================== Files 35 36 +1 Lines 2516 2626 +110 =========================================== + Hits 2127 2286 +159 + Misses 389 340 -49 ``` | [Flag](https://app.codecov.io/gh/ncbo/goo/pull/150/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ncbo) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/ncbo/goo/pull/150/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ncbo) | `87.05% <89.92%> (+2.51%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ncbo#carryforward-flags-in-the-pull-request-comment) to find out more.

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ncbo / goo