added docker/login-action

.github/workflows/system_test.yml

@@ -19,11 +19,16 @@ jobs:
     - name: Set up JDK 8
       uses: actions/setup-java@v2
       with:
-        github-token: ${{ secrets.GITHUB_TOKEN }}
         java-version: '8'
         distribution: 'adopt'
         server-id: github # Value of the distributionManagement/repository/id field of the pom.xml
         settings-path: ${{ github.workspace }} # location for the settings.xml file  
+    - name: Login to the Github Container Registry
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
     - name: ACA TPM2 Tests
       continue-on-error: true
       shell: bash