srsenb.conf.tmpl: use LTE sample rates when Lime is found in rf args

the lime doesn't work well with the shorter sample rates the eNB
uses by default.

Change-Id: I2d3dbdf5ff62980854ef67b20469f072ce31612e

src/osmo_gsm_tester/templates/srsenb.conf.tmpl

@@ -289,3 +289,6 @@ rrc_inactivity_timer = ${enb.inactivity_timer}
 #max_prach_offset_us  = 30
 eea_pref_list = ${', '.join(list(dict.fromkeys(enb.cipher_list))).upper()}
 eia_pref_list = ${', '.join(list(dict.fromkeys(enb.integrity_list))).upper()}
+% if "lime" in enb.rf_dev_args:
+lte_sample_rates = true
+% endif