sgsn: add osmo-sgsn.cfg, SGSN_Tests.cfg

Base on the docker-playground.git's config, but with 127.0.0.*.
All tests passing in jenkins are passing locally with this config.

Change-Id: I6da479e35fbe9f861a8bd8e578badcd1563e740f
diff --git a/sgsn/SGSN_Tests.cfg b/sgsn/SGSN_Tests.cfg
new file mode 100644
index 0000000..8782845
--- /dev/null
+++ b/sgsn/SGSN_Tests.cfg
@@ -0,0 +1,18 @@
+[ORDERED_INCLUDE]
+# Common configuration, shared between test suites
+"../Common.cfg"
+# testsuite specific configuration, not expected to change
+"./SGSN_Tests.default"
+
+# Local configuration below
+
+[LOGGING]
+
+[TESTPORT_PARAMETERS]
+
+[MODULE_PARAMETERS]
+
+[MAIN_CONTROLLER]
+
+[EXECUTE]
+SGSN_Tests.control