fixing test_lab_m1 not running in the master branch

ci_cd/labm1.yml

@@ -40,9 +40,11 @@ lint_lab_m1:
   needs: [compile_lab_m1]
   tags: [cppcheck]
 
+# don't run the test in the master branch
 test_lab_m1:
   stage: test
-  <<: *common_rules_m1
+  rules:
+    - if: '$CI_COMMIT_BRANCH != "master" && $CI_COMMIT_TAG == null'
   script:
     - echo "Testing Lab -1";
     - |
@@ -51,6 +53,4 @@ test_lab_m1:
         exit 1;
       fi
   needs: [lint_lab_m1]
-  except:
-    - master
   tags: [shell]
\ No newline at end of file