fix(topology): include all BSON types in ctor for bson-ext support

bson-ext requires a reference to all the BSON types in the
constructor in order to be able to call back into JavaScript during
serialization/deserialization.

NODE-2092

Author: mbroadst

lib/core/sdam/server.js

@@ -72,7 +72,24 @@ class Server extends EventEmitter {
       // the server logger
       logger: Logger('Server', options),
       // the bson parser
-      bson: options.bson || new BSON(),
+      bson:
+        options.bson ||
+        new BSON([
+          BSON.Binary,
+          BSON.Code,
+          BSON.DBRef,
+          BSON.Decimal128,
+          BSON.Double,
+          BSON.Int32,
+          BSON.Long,
+          BSON.Map,
+          BSON.MaxKey,
+          BSON.MinKey,
+          BSON.ObjectId,
+          BSON.BSONRegExp,
+          BSON.Symbol,
+          BSON.Timestamp
+        ]),
       // client metadata for the initial handshake
       clientInfo: createClientInfo(options),
       // state variable to determine if there is an active server check in progress

lib/core/sdam/topology.js

@@ -133,7 +133,24 @@ class Topology extends EventEmitter {
       // allow users to override the cursor factory
       Cursor: options.cursorFactory || CoreCursor,
       // the bson parser
-      bson: options.bson || new BSON(),
+      bson:
+        options.bson ||
+        new BSON([
+          BSON.Binary,
+          BSON.Code,
+          BSON.DBRef,
+          BSON.Decimal128,
+          BSON.Double,
+          BSON.Int32,
+          BSON.Long,
+          BSON.Map,
+          BSON.MaxKey,
+          BSON.MinKey,
+          BSON.ObjectId,
+          BSON.BSONRegExp,
+          BSON.Symbol,
+          BSON.Timestamp
+        ]),
       // a map of server instances to normalized addresses
       servers: new Map(),
       // Server Session Pool