Add LockFileCommon::FormatDateTime() to parse the fixed-format lock file time string (DD.MM.YYYY HH:MM) and reformat it using the user's configured locale setting Add unit tests for LockFileCommon::FormatDateTime() - testFormatDateTimeShortInput() - testFormatDateTimeLocaleOutput() Change-Id: I77c94dc2a21d9bec6cf5e2584556cd89f216c40d Reviewed-on: https://gerrit.libreoffice.org/c/core/+/204683 Tested-by: Jenkins Reviewed-by: Jonathan Clark <jonathan@libreoffice.org>