CEPH driver integration and testing, including resource type changes in API

[rhsakarpos]

Is this a BUG REPORT or FEATURE REQUEST?:

/kind feature

What happened: Integrate the CEPH exporter and the CEPH metrics driver with OpenSDS

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Environment:

• Hotpot(release/branch) version:
• OS (e.g. from /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Others:

[leonwanghui]

@Click2Cloud-Gamma Can u give an update on this issue?

[leonwanghui]

I think it's already resolved by #779