This update contains the following changes for Distributed
Cloud Fernet Key Synching & Management:
1.Distribute the fernet keys when the subcloud is managed
2.Setup a periodic task to rotate and re-distribute keys
3.Support fernet repo audit
Story: 2002842
Task: 22786
Depends-On: https://review.openstack.org/#/c/613620/
Change-Id: I203c937e9c2334da3f4766c0a49f32f71f7fd39e
Signed-off-by: Tao Liu <tao.liu@windriver.com>
3dceb62d37