Bug 33999: Subscription details link on bibliographic detail page should have permiss...

Bug 33999: Subscription details link on bibliographic detail page should have permission check

This patch wraps the "Subscription details" link on the bibliographic
detail page with a permissions check, "CAN_user_serials," so that a user
lacking permission to access the Serials module will not be shown the
link.

To test, apply the patch and view the bibliographic detail page of a
serial record.

- When viewing the "Subscriptions" tab as a user with Serials
  permissions you should see the "Subscription details" link.
- When viewing the tab as a user without the correct permissions the
  link should not be present.

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>