[FEATURE] When generating video/audio service files, copy a reference to the transcript files.

[rosiel]

Overview of feature request

When you upload a video/audio file, a service file derivative (can be) generated. These lack the transcripts that may have been uploaded in the "Media Track" fields. I propose that we copy the

What kind of user is the feature intended for?
(Example user roles: Collections Manager, Developer, Systems Administrator, or User)

What inspired the request?

What existing behavior do you want changed?

Any brand new behavior do you want to add to Islandora?

Any related open or closed issues to this feature request?

[rosiel]

Duplicate! I meant to make this in /documentation. see Islandora/documentation#2339