mgcp_client_test: cosmetically re-arrange reply_to() args

I want to test arbitrary length Conn IDs ('I:'), and hence don't want to pass
the conn_id as int, but rather just include it in the message string. Prepare
for that by eliminating the extra conn_id arg and just pass a params string.

Change-Id: Ib2e718dda3aa1f6e9979dee823d973dd002e2318
1 file changed