.gitlab-ci.yml: Include Junit XML test reports for server

Fixes #3470
3 jobs for hotfix-s/3548-fix-unit-tests in 4 minutes and 31 seconds
Status Name Job ID Coverage
  Test Tools
passed test_tools #181203

00:00:07

 
  Test Unit
passed test_server_unit #181204
web

00:00:23

 
  Test Functional
passed test_server_functional #181205
x86_64 docker

00:04:00