Remove Command Reference appendix

Remove the appendix from End User and Admin User guides.
Add new manual to the list of all manuals in the support appendix.

Update references to point to new book.

Change-Id: I0cc12c45b5487a18c8de285f4ef939dcab4c4831
Merge "Remove Command Reference appendix"
Move command references from section to chapters

Rename sections to chapters for the command references.

Update cli-reference to remove single "command references" chapter and
add a chapter per command.

Adjust training-guides.

Change-Id: I64b30bca4915eed4f312bb3d2b5692c11b19fc81