Open gallery endpoints

[burnout87]

Following the request from @francoismg and @ferrigno , the following endpoints no longer require the token:

• resolve_name
• get_data_product_list_with_conditions (it will be optional as a further check will be implemented in the gallery)
• get_data_product_list_by_source_name (along with a small refactoring: it uses now, the more general drupal endpoint to get a list of data_products given a certain set of conditions)

[codecov]

Codecov Report

Attention: Patch coverage is 3.70370% with 26 lines in your changes missing coverage. Please review.

Project coverage is 62.23%. Comparing base (bb62f68) to head (78d9157).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
cdci_data_analysis/flask_app/app.py	0.00%	26 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #734      +/-   ##
==========================================
+ Coverage   62.08%   62.23%   +0.15%     
==========================================
  Files          50       50              
  Lines        9175     9151      -24     
==========================================
- Hits         5696     5695       -1     
+ Misses       3479     3456      -23     

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[ferrigno]

Cannot comment the code, ok for the principle

[dsavchenko]

Hard for me to really review, I didn't follow gallery development. So I just approve.