rename devicePath to devicePathOrCid

Signed-off-by: Nick Wade <nwade@pivotallabs.com>
Break up persistent and ephemeral disk code paths in platform and infrastructure

Signed-off-by: Ben Smith <bsmith@pivotallabs.com>
get correct persistent disk for vsphere
[#62330732]

Signed-off-by: Nick Wade <nwade@pivotallabs.com>