update nova flags and tables

Removed docker references (the driver has been removed from nova).

Update confilcting pages including tables to use xrefs instead.

Add a rpc_all section to handle conflicts in the training-guides.

Closes-Bug: #1291138
Closes-Bug: #1292612
Change-Id: I67ad31c3913cae4c2e9e3d2ce41302717af5d839
Merge "update nova flags and tables"