Updates for 4.7.4 RC

[awoods]

• Update version of Fedora from 4.7.3 to 4.7.4-RC-1
• Remove Fedora audit war

Note: There is a follow-on ticket to simplify re-enabling audit next: https://jira.duraspace.org/browse/FCREPO-2531

p.s. Please do not squash these two commits.