epc: Replace rlc_drb_mode with qci attribute

Change-Id: I21b7d7009f9b0df8ec4f59189a65cfc26f164f04
diff --git a/example/defaults.conf b/example/defaults.conf
index 0b9136d..5cda132 100644
--- a/example/defaults.conf
+++ b/example/defaults.conf
@@ -97,8 +97,9 @@
   type: srsepc
   mcc: 901
   mnc: 70
+  qci: 9
+
 srsepc:
-  rlc_drb_mode: UM
   enable_pcap: false
 
 amarisoft: