payment: honor withPluginInfo in all API calls

This fixes https://github.com/killbill/killbill/issues/210.

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
profiles: bundle logback in war

We need a binding for SLF4J -- we will bundle logback by default.
Users willing to use another implementation will have to re-package
the war for now.

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