srsue.conf.tmpl: disable TTI stats for ZMQ

since ZMQ runs are not using wall clock anyway, measuring
TTI execution isn't useful, disable it therefore to avoid
misleading warnings.

Change-Id: I5c2cb0abcfce0ee67806f6611356f4d5d180541d
diff --git a/src/osmo_gsm_tester/templates/srsue.conf.tmpl b/src/osmo_gsm_tester/templates/srsue.conf.tmpl
index a57857b..a50f91e 100644
--- a/src/osmo_gsm_tester/templates/srsue.conf.tmpl
+++ b/src/osmo_gsm_tester/templates/srsue.conf.tmpl
@@ -381,3 +381,8 @@
 metrics_csv_enable  = true
 #metrics_period_secs = 1
 metrics_csv_filename = ${ue.metrics_filename}
+
+% if ue.rf_dev_type == 'zmq':
+[stack]
+have_tti_time_stats = false
+% endif