Prepare request and merge settings from env

For instance, this ensures the proxy socks set with http_proxy is taken
into account
2 jobs for master in 2 minutes and 23 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #385956
qlf-ci.inria.fr
doc

00:02:22

failed #385955
qlf-ci.inria.fr allowed to fail
pep8

00:01:47

 
Name Stage Failure
failed
pep8 Test
pep8 run-test-pre: PYTHONHASHSEED='239466135'
pep8 run-test: commands[0] | flake8
./__init__.py:5:1: F401 'requests.adapters.HTTPAdapter' imported but unused
from requests.adapters import HTTPAdapter
^
ERROR: InvocationError for command /builds/myriads-team/python-distem/.tox/pep8/bin/flake8 (exited with code 1)
___________________________________ summary ____________________________________
ERROR: pep8: commands failed
ERROR: Job failed: exit code 1