resurces.conf.prod: Add UmTRX device

Change-Id: I11f3275bddcc1c0c5bcd75e6a32f040a8f7c1174
diff --git a/example/scenarios/trx-umtrx.conf b/example/scenarios/trx-umtrx.conf
new file mode 100644
index 0000000..c13fa49
--- /dev/null
+++ b/example/scenarios/trx-umtrx.conf
@@ -0,0 +1,4 @@
+resources:
+  bts:
+  - label: UmTRX
+    type: osmo-bts-trx