Feature: Multilingual Support - Add search and languages serialization

[syphax-bouazzouni]

Require

• https://github.com/ncbo/goo/pull/150
• https://github.com/ncbo/goo/pull/154

Context

This PR, implements mostly two things:

• Display values in multiple languages, using a global variable requested_lang, see details and example here: https://github.com/ontoportal-lirmm/goo/pull/32
• Search values in multiple languages, see details here: https://github.com/ontoportal-lirmm/ontologies_linked_data/pull/94, an update of the SOLR schema.xml file is required.

See the added units tests, for examples.

Changes

• Add the serialize_defaults if attributes to load set to :all and some code cleaning (see details in https://github.com/ncbo/ontologies_linked_data/pull/145 )(https://github.com/ncbo/ontologies_linked_data/pull/199/commits/37f74d30f30aa903922ddffee463c4272bb48e80)
• When archiving a submission delete old files and zip master file if large size (https://github.com/ncbo/ontologies_linked_data/pull/199/commits/b6134ff85181b12bfcdf20e30cb63f815550f159)
• Refactor tests to be faster by doing the indexation step only if needed (from 15min to 9min) (https://github.com/ncbo/ontologies_linked_data/pull/199/commits/4304cc46ed1cf4126f656069df712595d3e077cb)
• Display the language tags when serializing the results to JSON (https://github.com/ncbo/ontologies_linked_data/pull/199/commits/36a5b68c38a02e0b221ba7b7bfc1169dc14ea01f)
• Update the term index step to include all languages [Require solr schema update](https://github.com/ncbo/ontologies_linked_data/pull/199/commits/ccf753f924c10884267e8578bb1e4ecde53163f6)
• Add multilingual support unit tests (https://github.com/ncbo/ontologies_linked_data/pull/199/commits/fc48343ad7a3f1867821c173be900cf16506b4b7)

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 71.55812% with 345 lines in your changes are missing coverage. Please review.

Project coverage is 78.10%. Comparing base (299a01c) to head (fc48343). Report is 116 commits behind head on develop.

Files	Patch %	Lines
...ion_process/operations/submission_rdf_generator.rb	55.33%	184 Missing :warning:
...ubmission_process/operations/submission_indexer.rb	60.97%	48 Missing :warning:
lib/ontologies_linked_data/utils/notifications.rb	61.11%	28 Missing :warning:
lib/ontologies_linked_data/serializers/json.rb	65.71%	12 Missing :warning:
...ocess/operations/submission_mertrics_calculator.rb	83.33%	12 Missing :warning:
lib/ontologies_linked_data/models/class.rb	83.07%	11 Missing :warning:
lib/ontologies_linked_data/metrics/metrics.rb	33.33%	8 Missing :warning:
...rocess/operations/submission_properties_indexer.rb	82.60%	8 Missing :warning:
...tologies_linked_data/models/ontology_submission.rb	64.28%	5 Missing :warning:
...ervices/submission_process/submission_processor.rb	91.93%	5 Missing :warning:
... and 10 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #199 +/- ## =========================================== - Coverage 80.80% 78.10% -2.71% =========================================== Files 63 74 +11 Lines 4907 5370 +463 =========================================== + Hits 3965 4194 +229 - Misses 942 1176 +234 ``` | [Flag](https://app.codecov.io/gh/ncbo/ontologies_linked_data/pull/199/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/ontologies_linked_data/pull/199/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ncbo) | `78.10% <71.55%> (-2.71%)` | :arrow_down: | 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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