payment_method: fix skip_gw flow
payment_method: fix skip_gw flow

This fixes https://github.com/killbill/killbill-stripe-plugin/issues/4.

See related patch https://github.com/killbill/killbill-plugin-framework-ruby/commit/94d5a860c56b498fa5097a280104e3f8e09c11ed.

Signed-off-by: Pierre-Alexandre Meyer <ff019a5748a52b5641624af88a54a2f0e46a9fb5@mouraf.org>

killbill/killbill-stripe-plugin,killbill/killbill-stripe-plugin