Use a concrete struct for server.Create options.
Update the acceptance tests to match.
Use a struct for Update options, too.
Let's call it "ToServerXyzReqBody".
ReqBody -> Map
Call it "CreateOptsBuilder".
Unnecessary reference operator :fire:
Another extraneous &
Merge pull request #209 from smashwilson/map-no-more

Provide structs for server creation and update