This commit applies the Black format to the `dcmanager/audit`
files to ensure that it adheres to the Black code style guidelines.
Test Plan:
PASS: Success in stx-distcloud-tox-black
Story: 2011149
Task: 50444
Change-Id: I3d4bc5051d92b8d5546b9b31d2b0d532f98212b4
Signed-off-by: Hugo Brito <hugo.brito@windriver.com>