cephdisks.ignored

[swiftgist]

Users do not have a trivial way of listing what disks are intentionally ignored by DeepSea. The closest process is listing all disks on a server and subtracting the result of salt 'data1*' cephdisks.list.

I think adding this to the log for every run is a bit noisy. I'll suggest creating another function in the cephdisks.py module.