ci(gitlab-ci): use templates from a common repository

3 jobs for branch/default in 1 minute and 17 seconds (queued for 14 seconds)
latest
Status Job ID Name Coverage
  Lint
passed yamllint #375428

00:00:19

 
  Tests
failed py27 #378170

00:00:57

failed py27 #375429

00:00:19

 
Name Stage Failure
failed
py27 Tests
WARNING: You are using pip version 20.0.2; however, version 20.3.4 is available.
You should consider upgrading via the '/builds/cubicweb/cubes/email/.tox/py27/bin/python -m pip install --upgrade pip' command.

=================================== log end ====================================
ERROR: could not install deps [-rrequirements-test.txt]; v = InvocationError(u'/builds/cubicweb/cubes/email/.tox/py27/bin/python -m pip install -rrequirements-test.txt', 1)
___________________________________ summary ____________________________________
ERROR: py27: could not install deps [-rrequirements-test.txt]; v = InvocationError(u'/builds/cubicweb/cubes/email/.tox/py27/bin/python -m pip install -rrequirements-test.txt', 1)
Cleaning up file based variables
ERROR: Job failed: command terminated with exit code 1