RUBY-2846 use BSON _bson_to_i method if it exists (#5473)

* RUBY-2896 use BSON _bson_to_i method if it exists

* RUBY-2846 change bson_master gemfile to test changes

* Update gemfiles/bson_master.gemfile

Author: neilshweky

lib/mongoid/extensions/time_with_zone.rb

@@ -26,9 +26,10 @@ def mongoize
       end
 
       # This code is copied from Time class extension in bson-ruby gem. It
-      # should be removed from here when added to bson-ruby.
-      # See https://jira.mongodb.org/browse/RUBY-2846.
+      # should be removed from here when the minimum BSON version is 5+.
+      # See https://jira.mongodb.org/browse/MONGOID-5491.
       def _bson_to_i
+        return super if defined?(super)
         # Workaround for JRuby's #to_i rounding negative timestamps up
         # rather than down (https://github.com/jruby/jruby/issues/6104)
         if BSON::Environment.jruby?