fix: maintain internal database name on collection rename

Author: mbroadst

lib/operations/rename.js

@@ -45,7 +45,7 @@ class RenameOperation extends OperationBase {
           new Collection(
             coll.s.db,
             coll.s.topology,
-            coll.databaseName,
+            coll.s.namespace.db,
             newName,
             coll.s.pkFactory,
             coll.s.options