Only upload actual existing coverage.xml artifacts

If the "main build job" fails, there will not be any coverage.xml, so
the post-run playbook would fail as well. This is suboptimal because the
user would see a "FAILURE_POST" build result instead of the expected
"FAILURE".

Change-Id: I386b7a78e0db36995dd0841f059f5b6657ddb804
1 file changed
tree: 1262712099b326123cd6e46c9c054f2991d104b1
  1. README.md
  2. playbooks/
  3. roles/
  4. zuul.yaml
README.md

Zuul jobs specific to CESNET