Added mcs-core to SFU error map

labs/bbb-webrtc-sfu/lib/base/errors.js

+exports.errors =  {
+  MIN_CODE: 2000,
+  MAX_CODE: 2999,
+  2000: "MEDIA_SERVER_CONNECTION_ERROR",
+  2001: "MEDIA_SERVER_OFFLINE",
+  2002: "MEDIA_SERVER_NO_RESOURCES",
+  2003: "ICE_ADD_CANDIDATE_FAILED",
+  2004: "ICE_GATHERING_FAILED",
+  2005: "MEDIA_SERVER_REQUEST_TIMEOUT",
+  2200: "MEDIA_GENERIC_ERROR",
+  2201: "MEDIA_NOT_FOUND",
+  2202: "MEDIA_INVALID_SDP",
+  2203: "MEDIA_NO_AVAILABLE_CODEC",
+  2208: "MEDIA_GENERIC_PROCESS_ERROR",
+  2209: "MEDIA_ADAPTER_OBJECT_NOT_FOUND",
+  2210: "MEDIA_CONNECT_ERROR",
+  2211: "MEDIA_NOT_FLOWING",
+}