payment: optimize pagination for payment methods

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
payment: populate kb payment method id in DefaultNoOpPaymentMethodPlugin

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
server: update default logback.xml

Silence verbose loggers when running Kill Bill in DEBUG mode.

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