Output dates using the local timezone in 'qvd-admin vm list'

git-svn-id: https://svn.qindel.com/repos/main/projects/qindel/QVD/src/trunk@22878 4046b530-fbad-4e16-af16-ee11f0b55167
parse datetime specifications relative to locale TZ

git-svn-id: https://svn.qindel.com/repos/main/projects/qindel/QVD/src/trunk@22898 4046b530-fbad-4e16-af16-ee11f0b55167
leave printers not configured by QVD untouched, fixes #1511

git-svn-id: https://svn.qindel.com/repos/main/projects/qindel/QVD/src/trunk@22905 4046b530-fbad-4e16-af16-ee11f0b55167