Make the script fail if there are compilation errors in tests

Signed-off-by: Flavia Rainone <frainone@redhat.com>

Author: fl4via

.github/workflows/ci.yml

@@ -34,7 +34,11 @@ jobs:
     - name: Print Version
       run: mvn -v
     - name: Build
-      run: mvn -U -B -fae -DskipTests -Dfindbugs clean install
+      run: |
+        mvn -U -B -fae -DskipTests -Dfindbugs clean install | tee outfile.txt
+        echo "Checking for build errors"
+        grep \\[ERROR\\] outfile.txt && echo "Found errors, see above" || echo "No errors found"
+        ! $(grep -q \\[ERROR\\] outfile.txt )
     - name: Tar Maven Repo
       shell: bash
       run: tar -czf maven-repo.tgz -C ~ .m2/repository