Added a logging option to TrogdirSyncinatorWorker

Before it was always logging. Now logging is off by default and you
have to pass in the `{log: true}` option when initializing
`TrogdirSyncinatorWorker` to turn it on
Added test for new update_from_trogdir method

This is testing the new method in `PeopleController` to make sure it
actually updates the person from trogdir.