Fix[CI]: print_cores.py: do not fail if no cores_dir

Signed-off-by: JEAN-LOUIS "JL" LEROY <[email protected]>

Author: jll63

.github/workflows/build.yaml

@@ -198,7 +198,7 @@ jobs:
           export GOPATH=$HOME/go
           export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin
           pip install -r ${{ github.workspace }}/src/python/requirements.txt
-          ${{ github.workspace }}/src/integration-tests/run-tests \
+          ret=${{ github.workspace }}/src/integration-tests/run-tests \
             "${{ matrix.mode }} and ${{ matrix.cluster }} and ${{ matrix.consistency }}" \
             --log-level ERROR                   \
             --log-file-level=info               \
@@ -210,7 +210,11 @@ jobs:
             --reruns=3                          \
             --durations=0                       \
             -n logical -v -rs
-
+          if [ "$ret" = 5 ]; then
+            echo "No tests collected.  Exiting with 0."
+            exit 0
+          fi
+          exit "$ret"
       - name: Print core information
         if: failure()
         run: |