WIP: Add default AthAlgSeq.TimeOut of 12 hours
Set via default arguments in MainServicesConfig.py
Old style configuration uses context dependent timeouts (https://acode-browser1.usatlas.bnl.gov/lxr/search?%21v=head&_filestring=py&_string=%5C.TimeOut&_casesensitive=1). 12 hours seems reasonably permissive.
Comments appreciated.