Some corrections were brought to the class via Test Driven Development

To follow the format of ANIS.

This allows the display of the licence information in a uniform way.

A use of @ngrx/component-store was made in order to retrieve the type of
the attributes to query. This leads to a cleaner implementation. Hence
all aliases can be retrieved in a reactive way.

The component store is now used to get all the aliases
contained in a given dataset.

This service is mainly to retrieve the attributes associated to a
dataset. It can be further used to retrieve the characteristics of a
dataset.

Use of abstraction to make it more specific and clean

(fix):Add OnInit method for the label to use on app-attribute-label

See merge request !98

This is a simple patch to test the validity of the previous temporary
fix. See previous commit for details.

WARNING: This is a temporary fix for the labelling of data on bootstrap array on
the front-end. Sall be fixed by further development on the server.

Finish refactor and add some tests

See merge request !97

Notably, some tests to check the throwing of errors

Merge branch '128-make-possible-to-inject-dynamically-a-one-line-array-of-datatable-in-the-detail-page' into 'develop'

Resolve "Make possible to inject dynamically a one line array of datatable in the detail page"

Closes #128

See merge request !96

Resolve "Client: Make possible to add simple form"

Closes #123

See merge request !93