Give the jobs unique names

.gitlab/Ubuntu-20.04-CI.yml

@@ -102,56 +102,56 @@ report_metrics_ubuntu20.04:
     - job: build_ubuntu20.04
       artifacts: true
 
-qa_python:
+qa_python_ubuntu20.04:
   extends:
     - .unit_test_ubuntu20.04
     - .only_code
   variables:
     TEST: 'qa_python'
 
-qa_common:
+qa_common_ubuntu20.04:
   extends:
     - .unit_test_ubuntu20.04
     - .only_code
   variables:
     TEST: 'qa_common'
 
-qa_gerbview:
+qa_gerbview_ubuntu20.04:
   extends:
     - .unit_test_ubuntu20.04
     - .only_code
   variables:
     TEST: 'qa_gerbview'
 
-qa_pcbnew:
+qa_pcbnew_ubuntu20.04:
   extends:
     - .unit_test_ubuntu20.04
     - .only_code
   variables:
     TEST: 'qa_pcbnew'
 
-qa_eeschema:
+qa_eeschema_ubuntu20.04:
   extends:
     - .unit_test_ubuntu20.04
     - .only_code
   variables:
     TEST: 'qa_eeschema'
 
-qa_kimath:
+qa_kimath_ubuntu20.04:
   extends:
     - .unit_test_ubuntu20.04
     - .only_code
   variables:
     TEST: 'qa_kimath'
 
-qa_sexpr:
+qa_sexpr_ubuntu20.04:
   extends:
     - .unit_test_ubuntu20.04
     - .only_code
   variables:
     TEST: 'qa_sexpr'
 
-qa_kicad2step:
+qa_kicad2step_ubuntu20.04:
   extends:
     - .unit_test_ubuntu20.04
     - .only_code