examples/sgsn: Use osmo-hlr with auth-policy remote by default

For the vty tests, add osmo-sgsn-accept-all.cfg (that does not need an HLR) and
use in vty_test_runner.py, otherwise the 'show sgsn' command will reply that it
could not connect to the HLR, failing the vty test which expects empty.

Change-Id: Ie3b2013198d3e2b780a4e31c36b89b58129dcacd

doc/examples/osmo-sgsn/osmo-sgsn-accept-all.cfg

@@ -0,0 +1,27 @@
+!
+! Osmocom SGSN configuration
+!
+!
+line vty
+ no login
+!
+sgsn
+ gtp local-ip 127.0.0.1
+ ggsn 0 remote-ip 127.0.0.2
+ ggsn 0 gtp-version 1
+ auth-policy accept-all
+!
+ns
+ timer tns-block 3
+ timer tns-block-retries 3
+ timer tns-reset 3
+ timer tns-reset-retries 3
+ timer tns-test 30
+ timer tns-alive 3
+ timer tns-alive-retries 10
+ encapsulation udp local-ip 127.0.0.1
+ encapsulation udp local-port 23000
+ encapsulation framerelay-gre enabled 0
+!
+bssgp
+!

doc/examples/osmo-sgsn/osmo-sgsn.cfg

@@ -9,6 +9,9 @@ sgsn
  gtp local-ip 127.0.0.1
  ggsn 0 remote-ip 127.0.0.2
  ggsn 0 gtp-version 1
+ auth-policy remote
+ gsup remote-ip 127.0.0.1
+ gsup remote-port 2222
 !
 ns
  timer tns-block 3

tests/vty_test_runner.py

@@ -829,7 +829,7 @@ class TestVTYSGSN(TestVTYGenericBSC):
 
     def vty_command(self):
         return ["./src/gprs/osmo-sgsn", "-c",
-                "doc/examples/osmo-sgsn/osmo-sgsn.cfg"]
+                "doc/examples/osmo-sgsn/osmo-sgsn-accept-all.cfg"]
 
     def vty_app(self):
         return (4245, "./src/gprs/osmo-sgsn", "OsmoSGSN", "sgsn")