CADC: correct spelling of LogCompatException
CADC: check multiple files are in CAOM-2 at once

This is intended to improve the performance of the output directory
cleaning routine.
Action: clarify logging of output file deletion
CADC: use proxy certificate for fetching

This replaces the direct use of the CADC username and password.
Since these are no longer needed, they have been removed from the
template configuration file.
CADC: move LogCompat to its own file

This is to allow it to potentially be used with other tools4caom2
routines.