Add hnbgw tests

Some tests for osmo-hnbgw with mgw support:
* hnb register
* ranap connect/disconnect
* rab assignment/release

Change-Id: I0a2fb795aec83337eda8d9972e6ff264ead61076
diff --git a/hnbgw/osmo-hnbgw.cfg b/hnbgw/osmo-hnbgw.cfg
new file mode 100644
index 0000000..f11f613
--- /dev/null
+++ b/hnbgw/osmo-hnbgw.cfg
@@ -0,0 +1,35 @@
+!
+! OsmoHNBGW (1.1.0) configuration saved from vty
+!!
+!
+log stderr
+ logging filter all 1
+ logging color 1
+ logging print category-hex 1
+ logging print category 1
+ logging print thread-id 0
+ logging print extended-timestamp 1
+ logging print file 1
+ logging level set-all debug
+!
+line vty
+ no login
+!
+cs7 instance 0
+ point-code 0.23.5
+ sccp-address msc
+  routing-indicator PC
+  point-code 0.23.4
+ sccp-address sgsn
+  routing-indicator PC
+  point-code 0.23.1
+hnbgw
+ log-prefix hnb-id
+ iuh
+  local-ip 127.0.0.1
+  local-port 29169
+  hnbap-allow-tmsi 1
+ iucs
+  remote-addr msc
+ iups
+  remote-addr sgsn