Fix: Some lost code after submission refactoring PR and fix a bug the context language been empty

[syphax-bouazzouni]

Changes

• https://github.com/ncbo/ontologies_linked_data/pull/202 and add context parents generation tests (https://github.com/ncbo/ontologies_linked_data/pull/204/commits/c83b0d56b098dd16f6d0cd52268b8701ece1fb84)

• fix context language to not be empty array if submission language values are not URIs but just two letter strings (https://github.com/ncbo/ontologies_linked_data/pull/204/commits/066c6c57f97ee924e928f9e933818afbf4e59a50)

• Re-apply some remove code of the submission refactor

• Complete metadata extraction test to close https://github.com/ncbo/ontologies_linked_data/issues/200 (https://github.com/ncbo/ontologies_linked_data/pull/204/commits/ffc648fb74f654acf42e6e33cdd4589fe792da7c)

• Do not send email notification when submissions are archived by @alexskr (https://github.com/ncbo/ontologies_linked_data/pull/204/commits/b208745ed151d23c0a0943a53f02abfdfc4b92c6) and added a unit test for it (https://github.com/ncbo/ontologies_linked_data/pull/204/commits/3b9d3f13ec489fc6130bc06549a904acc228a171) to close https://github.com/ncbo/ontologies_linked_data/issues/190

• include changes of https://github.com/ncbo/ontologies_linked_data/issues/203

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 94.11765% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 78.90%. Comparing base (0227d37) to head (f14a7eb).

Files	Patch %	Lines
lib/ontologies_linked_data/serializers/json.rb	94.44%	1 Missing :warning:
...ervices/submission_process/submission_processor.rb	50.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## feature/multilingual-support-add-search-and-languages-serialization #204 +/- ## ======================================================================================================= + Coverage 78.10% 78.90% +0.79% ======================================================================================================= Files 74 74 Lines 5372 5385 +13 ======================================================================================================= + Hits 4196 4249 +53 + Misses 1176 1136 -40 ``` | [Flag](https://app.codecov.io/gh/ncbo/ontologies_linked_data/pull/204/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/204/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ncbo) | `78.90% <94.11%> (+0.79%)` | :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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