cryptsetup completion missing commands

[Jason Straight]

Basic luks commands are missing, such as luksOpen, luksClose from completion, that were there in previous versions.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: bash-completion 1:2.8-1ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu5
Architecture: amd64
CurrentDesktop: KDE
Date: Tue Apr 17 10:30:31 2018
Dependencies:

InstallationDate: Installed on 2018-04-16 (0 days ago)
InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180416)
PackageArchitecture: all
SourcePackage: bash-completion
UpgradeStatus: No upgrade log present (probably fresh install)