epc_open5gs: remove _epc from name

there is no open5gs_enb so having the epc in the name is redundent, also
it safes typing and allows longer scenario configs without exceeding
filename limit.

Change-Id: Ib10bc6031ecc8de88a9c718b136d2641ce46e11d
diff --git a/src/osmo_gsm_tester/obj/epc.py b/src/osmo_gsm_tester/obj/epc.py
index 4c43f5e..90a6cbb 100644
--- a/src/osmo_gsm_tester/obj/epc.py
+++ b/src/osmo_gsm_tester/obj/epc.py
@@ -71,7 +71,7 @@
         elif epc_type == 'srsepc':
             from .epc_srs import srsEPC
             epc_class = srsEPC
-        elif epc_type == 'open5gsepc':
+        elif epc_type == 'open5gs':
             from .epc_open5gs import Open5gsEPC
             epc_class = Open5gsEPC
         else: