suites: Add an initial test for the ms_driver

Things to make configurable:
* IMSI and matching MSISDN ranges (start + count)
* Timeouts and number of MS (which should be related)

Change-Id: I5be2a6b4d3d21bf48625624b9e2cccb33765fe39

suites/nitb_netreg_mass/register_default_mass.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+"""
+Run a network registration with a 'massive' amount of MS
+using the ms_driver infrastructure.
+"""
+from osmo_gsm_tester.testenv import *
+
+print('use resources...')
+nitb = suite.nitb()
+bts = suite.bts()
+ms_driver = suite.ms_driver()
+
+print('start nitb and bts...')
+nitb.bts_add(bts)
+nitb.start()
+bts.start()
+wait(nitb.bts_is_connected, bts)
+
+# Configure all MS that the MS driver knows about.
+for ms in ms_driver.ms_subscribers():
+    nitb.subscriber_add(ms)
+
+# Run the base test.
+ms_driver.run_test()
+
+# Print stats
+ms_driver.print_stats()

suites/nitb_netreg_mass/suite.conf

@@ -0,0 +1,8 @@
+resources:
+  ip_address:
+  - times: 1
+  bts:
+  - times: 1
+
+defaults:
+  timeout: 40s