The current API doc for v3 roles is very difficult to navigate. This
patch reorders the APIs in the following order:
- roles
- group roles on domain
- user roles on domain
- group roles on project
- user roles on project
- implied (infererence) roles
- others
Inside each group, APIs are reordered as following:
- list
- create (assign)
- get/retrieve
- verify/confirm (if applicable)
- update (if applicable)
- delete
Change-Id: I465cd493958a3e8384a7ae750b528d5fc08326de
d45d82f6ed