Re-enables WEBAC test 5.8-A-2.

[dbernstein]

This PR should be merged once the resolution to https://jira.duraspace.org/browse/FCREPO-2977 has made it into a production release (most likely 5.0.2).

[awoods]

Resolves: #317

[awoods]

Running this PR against 5.x-maintenance, I now get:

===============================================
Fedora API Specification Test Suite
Total tests run: 239, Failures: 13, Skips: 25
===============================================

..compared with: https://fedora.info/spec-tests/

What do you get, @dbernstein ?

The new failures are:

• 6.1
• 6.2-A
• 6.2-B
  ..which I re-verified pass against Fedora 5.0.0.

Issue is caused by: fcrepo/fcrepo@63c9b02

Fails at:

• https://github.com/fcrepo/Fedora-API-Test-Suite/blob/master/src/main/java/org/fcrepo/spec/testsuite/event/NotificationTest.java#L102
• https://github.com/fcrepo/Fedora-API-Test-Suite/blob/master/src/main/java/org/fcrepo/spec/testsuite/event/NotificationTest.java#L161
• https://github.com/fcrepo/Fedora-API-Test-Suite/blob/master/src/main/java/org/fcrepo/spec/testsuite/event/NotificationTest.java#L247

[awoods]

However, the test in this PR now works 👍