Get rid of httplib2, use urllib3 instead
httplib2 has been abandonned by its author [1] and is less going
to be updated and maintained than urllib3. So, let's replace httplib2
with urllib3.
Note that this patch mostly rework the unit tests.
I removed the files `tempest.tests.fake_identity` and
`tempest.tests.fake_http` to use their `tempest.tests.lib` counterpart.
Also, I tried to "encapsulated" HTTP calls and use
`tempest/lib/common/http.py` everywhere so that we only import
urllib3 once. This makes us not so dependent on a specific HTTP
library.
[1] http://bitworking.org/news/2016/03/an_update_on_httplib2
Change-Id: Id469e78afdb69a404144568a454d98d20a924231
21 files changed