Add test case to assert SuccessWithWarning is handled
Coding standards
Handle SuccessWithWarning in setExpressCheckout, getExpressCheckout and doExpressCheckout
testDoExpressCheckoutPaymentSuccessWithWarning
SuccessWithWarning
Handle SuccessWithWarning in doDirectPayment
testDoDirectPaymentSuccessWithWarning
fix testDoDirectPaymentSuccessWithWarning
testSetExpressCheckoutReallyLooooooooooongDescription
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