The captions' metadata is not automatically updated on Youtube when it is changed on Pumukit.

[iriadp]

Steps to reproduce it:

• Publish a MMO with captions on Youtube.
• When it is correctly published with its captions, update the metadata of them (language, name).
• Wait until the crons' execution.

Actual behaviour: Captions' metadata remain the same on Youtube, it doesn't get updated. We need to delete them and upload them with the new metadata to see those changes on Youtube.
Expected behaviour: The captions' metadata should be automatically updated on Youtube when it is changed on Pumukit.