added aws credentials to unit test github workflow

.github/workflows/unit_tests.yml

@@ -26,6 +26,12 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install -r model_data/requirements/requirements.txt
+      - name: Set dev AWS credentials
+        uses: aws-actions/configure-aws-credentials@v1
+        with:
+          aws-access-key-id: ${{ secrets.DEV_AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.DEV_AWS_SECRET_ACCESS_KEY }}
+          aws-region: eu-west-2
       - name: Run tests with pytest
         run: |
           pip install -r model_data/requirements/dev.txt