Add support for SES event info

[adjohn]

Here's the docs on SES context: https://docs.aws.amazon.com/lambda/latest/dg/eventsources.html#eventsources-ses-email-receiving

[XerTheSquirrel]

Okay so, there is no standard SESEvent handler that is available for Java which I can find, Event Info for Java depends on the input object and does not use the input JSON. SES events can be placed inside of SNS events but there are standalone SES events which do not have the event class.