bsc: Add statsd checker and use it in TC_assignment_sign

Related: SYS#4877
Change-Id: I8526b645dc4af59adcc1855699421a026f505c1d
diff --git a/bsc/osmo-bsc.cfg b/bsc/osmo-bsc.cfg
index cbadece..f8be2cd 100644
--- a/bsc/osmo-bsc.cfg
+++ b/bsc/osmo-bsc.cfg
@@ -41,7 +41,15 @@
  logging level lm3ua notice
  logging level lmgcp notice
 !
-stats interval 5
+stats interval 0
+stats reporter statsd
+ prefix TTCN3
+ level subscriber
+ remote-ip 127.0.0.1
+ remote-port 8125
+ flush-period 1
+ mtu 1024
+ enable
 !
 line vty
  no login