On iRODS 4.2.x replace 2-stage put and checksum with native put+checksum+verify

[kjsanger]

Publisher.pm puts a file in 2 stages; a put without checksum, followed by checksum calculation. This was a workaround for silent checksum omissions on put in iRODS 4.1. By having a distinct checksum operation we would see a failure response from the server if checksumming failed.

The downside of the workaround is 1) this is two network operations 2) we don't get server-side checksum verification during the put operation.

We should try making this a one-step put once more and enable verification.