amended all cron scripts which used DateTime directly to use L::Local::Utils::time_now() instead, so time calculated correctly at day rollover (ie considers BST); patched Utils::time_now() to accept args for DT constructor (eg formatter)}
git-svn-id: https://jti.org.uk/svn/hmds_lims/trunk@1202 4177bd82-f056-0410-812d-caef170e3fa0
