Merge branch 'maintenance/scalfmm-2.0' of...

Merge branch 'maintenance/scalfmm-2.0' of https://gitlab.inria.fr/solverstack/ScalFMM into maintenance/scalfmm-2.0

* 'maintenance/scalfmm-2.0' of https://gitlab.inria.fr/solverstack/ScalFMM:
  Update .gitlab-ci.yml file new docker image

.gitlab-ci.yml

-image: hpclib/hiepacs
+image: registry.gitlab.inria.fr/solverstack/docker/distrib
 
 before_script:
   - source /usr/share/modules/init/bash && source /usr/local/share/spack/setup-env.sh && spack load cmake@3.14.4