Fixed: sampleserver for C-{GET,MOVE} forgot to close the channel
Fixed: sampleserver for C-{GET,MOVE} forgot to close the channel

Reviewers: jbredno

Reviewed By: jbredno

Differential Revision: https://phabricator.grailbio.com/D7679

fbshipit-source-id: dd27793

grailbio/go-netdicom,grailbio/go-netdicom