[IMPORTANT] changed network_access_mode: 0 (#1323)

The network access mode of HSS has been changed to 0 (Packet and Circuit).

Versions of MME prior to v2.4.2 did not use this value. Open5GS set
the attach result of Attach Complete message as it is by looking
at the attach type of the Attach Request message.

Now, if the network access mode of HSS is set to 2 (Only Packet),
this value is affected by MME from v2.4.3. Regardless of the attach type
of the Attach Request, the MME will set EPS Only to the attach result
of Attach Complete.

misc/db/python/test_SchemaUpdater.py

@@ -12,7 +12,7 @@ class TestSchemaUpdater(unittest.TestCase):
                 'downlink': 1024000,
                 'uplink': 1024000
             },
-            'network_access_mode': 2,
+            'network_access_mode': 0,
             'pdn': [
                 {
                     'apn': 'internet',