There are few POST API which does not take request
body as mandatory. For example POST 'servers/%s/consoles/
For such API, functional sample tests using some empty
request sample template. And doc/api_samples dir does
not have such empty sample file.
This commit removes those empty sample files and make
_do_post() base method to make body and subs param as optional
for such API.
Also add one missing sample file(non empty) in doc/api_samples dir.
Change-Id: I163e17a4a8253594e1768ed9b118fba63d5e08f1
2ac1bfa767