Do not include the tag of the metadata when saving to the triple store

[imadbourouche]

Context

This issues is to complete the work after this issue:

• Suppression de métadonnées dans subject ne marche pas #745

A temporary solution was made with a script to clean the metadata in the triple store but this is not solving the root cause of the problem:

• Fix: metadata cleaner script ontoportal-lirmm/ncbo_cron#36

related to this also:

• Refine the metadata extraction behaviour ontoportal-lirmm/bioportal_web_ui#1148 (comment)

Explanation

In the metadata extraction phase, when we save the metadata we have to save them without the tags because this will make some problem when editing/removing them from the UI.

This is the scenario:

• Ontology submitted and parsed
• In the extraction metadata phase some metadata are extracted with tags example: keyword@en
• When saving to the triple store we save it with the tag.
• In the UI when we display it we display it like this: keyword (without the tag)
• So after when editing/removing the keyword and save we will send the keyword without the tag, which will add it to the database (as duplicate)