Remove usage of SUDO_CMD from generate-reprepro-codename
Remove usage of SUDO_CMD from generate-reprepro-codename

The script generate-reprepro-codename is already called by SUDO_CMD (so,
as the reprepro user if necessary) from build-and-provide-package.

Fixes #220

hashar/jenkins-debian-glue,linuxmaniac/jenkins-debian-glue,hashar/jenkins-debian-glue,mika/jenkins-debian-glue,mika/jenkins-debian-glue,linuxmaniac/jenkins-debian-glue