Read permissions when rendering relationship links in metadata

[LaszloKecskes]

fixes https://github.com/huridocs/Internal-Issues/issues/66

PR checklist:

• [ ] Update READ.me ?
• [ ] Update API documentation ?

QA checklist:

• [ ] Smoke test the functionality described in the issue
• [ ] Test for side effects
• [ ] UI responsiveness
• [ ] Cross browser testing
• [ ] Code review