{enb,epc,ms}_srs: expose log.all_level parameter

expose paramter to set log level, use warning as default

Change-Id: I4e77e5351399aefef47a309c82b8805e2c6022c5
diff --git a/src/osmo_gsm_tester/obj/enb_srs.py b/src/osmo_gsm_tester/obj/enb_srs.py
index 1b23172..0bf4f8b 100644
--- a/src/osmo_gsm_tester/obj/enb_srs.py
+++ b/src/osmo_gsm_tester/obj/enb_srs.py
@@ -29,6 +29,7 @@
 def on_register_schemas():
     config_schema = {
         'enable_pcap': schema.BOOL_STR,
+        'log_all_level': schema.STR,
         }
     schema.register_config_schema('enb', config_schema)