suzerain: correct copyright year

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@42377 0bd85f0b-c151-43b9-a1e9-27231104551f
suzerain: #2503 largo_definition inherits from spec

Refactors largo_definition to use largo_specification as a public base class.

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@42378 0bd85f0b-c151-43b9-a1e9-27231104551f