Update P1 check and add use of local files for ART

Two changes to db auth checks/file usage

• Remove duplication in the check of P1 environment
• Change from eos to local file use for use in ART where can't use afs or directly eos (previous attempt). ART script will copy files locally before this is run so check added to ensure this has happened

Have tested that querying,extracting and inserting using the afs versions still works fine and nothing for that has been broken.

Hi @mark - does this match the kind of way you preferred for checking/steering this?