MOLPay: Initial Commit

[saifiikmal]

Please review as this is initial commit for MOLPay to Active Merchant. TQ

[tekjau]

Kindly help to merge this as there quite a number of requests from South-East Asia merchants to use MOLPay as payment gateway, especially we have introduced MOLPay CASH @ 7-eleven, and also secure 1-click payment (tokenization), loyalty program with BCard (under Berjaya Group). Thanks.

[tekjau]

Supported countries: (ordered by weight)
MY
CN
SG
PH
VN
ID
AU
NZ

[saifiikmal]

Hmm..the job no. 2460.12 failed due to connection problem while others are OK..would be helpful if there is Travis CI rebuild button to rebuild again instead of commit another changes.. cc @leoniddinershtein, @jduff

[ntalbott]

ActiveMerchant integrations have been extracted into https://github.com/Shopify/offsite_payments. This PR has been moved (via reference) to the new repo - please follow up on it there.