This commit applies the Black format to the `dcmanager`
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: I4a8af46e24d4b5da2757f0a4e20a50a69523c44a
Signed-off-by: Hugo Brito <hugo.brito@windriver.com>
8c27f069dd