ms_srs: add freq_offset as resource param

this allows to specify a freq tuning offset in Hz in the MS resource config

Change-Id: Iab726edd27e890d2c2dddbea91afe80d8a5068aa
diff --git a/src/osmo_gsm_tester/templates/srsue.conf.tmpl b/src/osmo_gsm_tester/templates/srsue.conf.tmpl
index 05c6c55..be75347 100644
--- a/src/osmo_gsm_tester/templates/srsue.conf.tmpl
+++ b/src/osmo_gsm_tester/templates/srsue.conf.tmpl
@@ -38,7 +38,7 @@
 % else:
 dl_earfcn = 2850
 % endif
-freq_offset = 0
+freq_offset = ${ue.freq_offset}
 tx_gain = ${ue.tx_gain}
 rx_gain = ${ue.rx_gain}