Merge branch 'update-CI' into 'master'

update CI script to use the internal docker image

See merge request !2
2 jobs for master in 3 minutes and 22 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Check
failed #996
allowed to fail
pep8

00:00:42

 
  Install
passed #997
test_install

00:02:40

 
Name Stage Failure
failed
pep8 Check
 - [deleted]         (none)     -> origin/update-CI
c0a78ae..fcb125a master -> origin/master
Checking out fcb125a0 as master...
Skipping Git submodules setup
$ export PATH=$PATH:$HOME/.local/bin
$ pycodestyle
./setup.py:78:80: E501 line too long (85 > 79 characters)
./tests/__init__.py:2:80: E501 line too long (82 > 79 characters)
ERROR: Job failed: exit code 1