Avoid lock on graph uri update (VIVO-3885)
What does this pull request do?
Run graph uri update in a separate thread to avoid lock
How should this be tested?
Test as in issue description:
- Populate an instance with 10+ million triples.
- Log in as root or admin: submit email and password.
- There should not be any delay before you are redirected to Site Admin.
- Log out, there should not be any delay before you are redirected to home page.
Interested parties
@VIVO-project/vivo-committers @chenejac @brianjlowe