updating Archivematica version number in Agents table

in preparation for 1.3.0 release
Updating version number

in preparation for 1.3.0 release
characterizeFile: validate XML before inserting to DB

This ensures that if the characterization tool returns invalid XML,
it will not be saved to the database in order to avoid later issues
with createMETS2.

For instance, in some circumstances FITS may print error output to the
stdout stream alongside actual XML content, resulting in a document
that will not parse.

Fixes #7422.