cyber_source: add Apple Pay support

More broadly, this patch implements the Payment Network Tokenization
spec:

  http://apps.cybersource.com/library/documentation/dev_guides/tokenization/Tokenization.pdf

See also the EMV Payment Tokenisation Specification spec:

  http://www.emvco.com/specifications.aspx?id=263

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
gateways: initial support for PayU Latam

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
test: remove failing PayU tests

void, capture and refund aren't supported in the sandbox.

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
Merge branch 'apple-pay' into killbill
Merge branch 'payulatam' into killbill
alfabank: initial support

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
Merge branch 'alfabank-support-gateway' into killbill
test: fix test failure for PayU

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
Merge branch 'payulatam' into killbill