{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/templates/srsenb.conf.tmpl b/src/osmo_gsm_tester/templates/srsenb.conf.tmpl
index e0c54a1..b58db53 100644
--- a/src/osmo_gsm_tester/templates/srsenb.conf.tmpl
+++ b/src/osmo_gsm_tester/templates/srsenb.conf.tmpl
@@ -122,7 +122,7 @@
 #                If set to negative, a single log file will be created.
 #####################################################################
 [log]
-all_level = warning
+all_level = ${enb.log_all_level}
 all_hex_limit = 32
 filename = ${enb.log_filename}
 file_max_size = -1