debug logging only for ModelPredictiveControl package

Author: franckgaga

.github/workflows/CI.yml

@@ -29,7 +29,7 @@ jobs:
     steps:
       - name: Set JULIA_DEBUG environment variable
         if: ${{ runner.debug == '1' }}
-        run: echo "JULIA_DEBUG=all" >> $GITHUB_ENV
+        run: echo "JULIA_DEBUG=ModelPredictiveControl" >> $GITHUB_ENV
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@v1
         with: