hnbgw: Implement validation of [some] counters

Let's use the StatsD_Checker to verify that counters increment when
we expect them to.

Change-Id: Ib0e2dd23802b18f4bd417150d0b62954b1d459a4
diff --git a/hnbgw/HNBGW_Tests.default b/hnbgw/HNBGW_Tests.default
index 02cbcb1..51bcdac 100644
--- a/hnbgw/HNBGW_Tests.default
+++ b/hnbgw/HNBGW_Tests.default
@@ -13,7 +13,7 @@
 *.HNBGWVTY.PROMPT1 := "OsmoHNBGW> "
 *.STATSVTY.CTRL_MODE := "client"
 *.STATSVTY.CTRL_HOSTNAME := "127.0.0.1"
-*.STATSVTY.CTRL_PORTNUM := "4262"
+*.STATSVTY.CTRL_PORTNUM := "4261"
 *.STATSVTY.CTRL_LOGIN_SKIPPED := "yes"
 *.STATSVTY.CTRL_DETECT_SERVER_DISCONNECTED := "yes"
 *.STATSVTY.CTRL_READMODE := "buffered"