Tests: test new GVariant functionality
Tests: test new GVariant functionality

Duplicate the test_settings_iter() test and modify it to operate on
GVariants. This adds test coverage for ag_account_set_variant() and
ag_account_settings_iter_get_next().
(ag_account_get_variant() is already used by ag_account_get_value(), so
it's already implicitly tested)


Distrotech/libaccounts-glib,Distrotech/libaccounts-glib,Distrotech/libaccounts-glib,Distrotech/libaccounts-glib