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/osmo-upf.cfg b/upf/osmo-upf.cfg
new file mode 100644
index 0000000..f84a4ae
--- /dev/null
+++ b/upf/osmo-upf.cfg
@@ -0,0 +1,16 @@
+log stderr
+ logging filter all 1
+ logging color 1
+ logging print category-hex 0
+ logging print category 1
+ logging print thread-id 0
+ logging print extended-timestamp 1
+ logging print level 1
+ logging print file basename last
+ logging level set-all debug
+pfcp
+ local-addr 127.0.0.1
+gtp
+ mockup
+nft
+ mockup