repoadd: add --nogpgcheck option

Signed-off-by: Richard Marko <rmarko@redhat.com>
reposync: more robust error handling

Signed-off-by: Richard Marko <rmarko@redhat.com>
storage: delete lobs automatically on object deletion

So we don't need to care about deleting lobs
separately which is prone to errors.

Signed-off-by: Richard Marko <rmarko@redhat.com>
archadd: use pyfaf.queries

Signed-off-by: Richard Marko <rmarko@redhat.com>