enb: Add attribute to set 'id'

Change-Id: I8ce296c7875d557062dc13e7093ce0400050f2ce
diff --git a/src/osmo_gsm_tester/resource.py b/src/osmo_gsm_tester/resource.py
index d4757f3..cafdab8 100644
--- a/src/osmo_gsm_tester/resource.py
+++ b/src/osmo_gsm_tester/resource.py
@@ -89,6 +89,7 @@
         'enb[].remote_user': schema.STR,
         'enb[].addr': schema.IPV4,
         'enb[].gtp_bind_addr': schema.IPV4,
+        'enb[].id': schema.UINT,
         'enb[].num_prb': schema.UINT,
         'enb[].transmission_mode': schema.LTE_TRANSMISSION_MODE,
         'enb[].rf_dev_type': schema.STR,