Add support for Ceph storage Delfin

[joseph-v]

Issue/Feature Description:
Add support for Ceph storage to Delfin by creating driver for Ceph
Create document for Steps to deploy and test Ceph
User guide in Delfin for Ceph Monitoring

Why this issue to fixed / feature is needed(give scenarios or use cases):

How to reproduce, in case of a bug:

Other Notes / Environment Information: (Please give the env information, log link or any useful information for this issue)