add upf/ to test osmo-upf

So far testing only PFCP interaction without real GTP traffic.

Related: SYS#5599
Change-Id: If67819dea785597841f21d8c444cb4866cfde571
diff --git a/upf/expected-results.xml b/upf/expected-results.xml
new file mode 100644
index 0000000..3504126
--- /dev/null
+++ b/upf/expected-results.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0"?>
+<testsuite name='UPF_Tests' tests='0' failures='0' errors='0' skipped='0' inconc='0' time='MASKED'>
+
+</testsuite>