Revert "check-build-and-verify.sh: dump XML report from Robot Framework."

This reverts commit a309046.

After I fixed the problem with truncated output in #631 we can dump HTML
report again.

Author: php-coder

src/main/scripts/ci/check-build-and-verify.sh

@@ -226,7 +226,7 @@ fi
 # Just encode it to a gzipped binary form and dump to console.
 if fgrep -qs 'status="FAIL"' target/robotframework-reports/output.xml; then
 	echo "===== REPORT START ====="
-	cat target/robotframework-reports/output.xml | gzip -c | base64
+	cat target/robotframework-reports/log.html | gzip -c | base64
 	echo "===== REPORT END ====="
 fi