osmo-stat-dummy: add rate counters and statsd tester

It's handy for testing rate counters as well as statsd metrics.

Related: OS#5671
Change-Id: Ibd8b17aa3ba9ceb527c6231310f01d736fb542a7
diff --git a/utils/osmo-stat-dummy/osmo-stat-dummy.cfg b/utils/osmo-stat-dummy/osmo-stat-dummy.cfg
new file mode 100644
index 0000000..559fe4e
--- /dev/null
+++ b/utils/osmo-stat-dummy/osmo-stat-dummy.cfg
@@ -0,0 +1,40 @@
+log stderr
+ logging filter all 1
+ logging color 0
+ logging timestamp 0
+ logging print extended-timestamp 0
+ logging print category-hex 0
+ logging print category 1
+ !logging print file basename
+ ! log-levels defined by libosmocore and hence available everywhere, can be overridden by inidividual per-app configs below
+ logging level lstats notice
+ logging level lglobal notice
+ logging level llapd notice
+ logging level linp notice
+ logging level lmux notice
+ logging level lmi notice
+ logging level lmib notice
+ logging level lsms notice
+ logging level lctrl notice
+ logging level lgtp notice
+ logging level lgsup notice
+ logging level loap notice
+ logging level lss7 error
+ logging level lsccp notice
+ logging level lsua notice
+ logging level lm3ua notice
+ logging level lmgcp notice
+ logging level ljibuf notice
+ logging level lrspro notice
+stats reporter statsd
+ !use default https://learn.netdata.cloud/ statsd plugin:
+ remote-ip 127.0.0.1
+ remote-port 8125
+ level global
+ no prefix
+ enable
+stats interval 1
+line vty
+ bind 127.0.0.2 6969
+ctrl
+ bind 127.0.0.11 1234