Switch to noun-verb command forms

Reverse the commands to use nouns followed by
verbs to allow users to take full advantage of
tab completion.

Compound nouns (e.g., "floating-ip") are also
reversed (e.g., "ip floating list" and "ip fixed list").

blueprint nouns-vs-verbs

Change-Id: Icf09fb8d7dbd09772bddbbeb74f9a379d9189b72
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
Merge "Switch to noun-verb command forms"