ci: Fix unit test execution with boost 1.60

Change-Id: I8bdefd6d5e082f01c827fbe4a92ce5c7952b8bd1
Refs: #3417
diff --git a/.jenkins.d/20-tests.sh b/.jenkins.d/20-tests.sh
index 80345e3..bb1cf63 100755
--- a/.jenkins.d/20-tests.sh
+++ b/.jenkins.d/20-tests.sh
@@ -17,7 +17,7 @@
 
 # Run unit tests
 if [[ -n "$XUNIT" ]]; then
-    ./build/unit-tests --log_format2=XML --log_sink2=build/xunit-report.xml --log_level=all
+    ./build/unit-tests --log_level=all -- --log_format2=XML --log_sink2=build/xunit-report.xml
 else
     ./build/unit-tests -l test_suite
 fi