[Moose-dev] copy artifact plugin

Copy artifact plugin in the jenkins wasn't correctly installed when we recovered from the glitches in Inria infrastructure. I've installed the plugin in the jenkins, however the jobs using the plugin prior to the problem do not have this step any more in their configuration. We'll have to add the step for red builds (i.e. copy required artefacts from the other upstream jobs). I've done it for a few but there are some jobs (GT-*) that I do not know what to copy and from where so we need to go through the failing builds.