fix: #777 - Add support for FIFO headers for SNS FIFO topics.

[dmitry-weirdo]

:loudspeaker: Type of change

• [ ] Bugfix
• [ ] New feature
• [x] Enhancement
• [ ] Refactoring

:scroll: Description

Added support of message-group-id and message-deduplication-id headers. They will be set to the appropriate fields of PublishRequest. This will make it possible to post to a FIFO SNS topic with NotificationMessagingTemplate.

:bulb: Motivation and Context

Fixes https://github.com/spring-cloud/spring-cloud-aws/issues/777.

:green_heart: How did you test it?

Tested with a real FIFO queue on AWS. Also works with Localstack.

:pencil: Checklist

• [ ] I reviewed submitted code
• [ ] I added tests to verify changes
• [ ] I updated reference documentation to reflect the change
• [ ] All tests passing
• [x] No breaking changes

:crystal_ball: Next steps

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[pivotal-cla]

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[maciejwalkowiak]

Thanks for the PR, this feature has been already implemented in https://github.com/awspring/spring-cloud-aws/pull/130

https://github.com/spring-cloud/spring-cloud-aws is a maintenance only repository, development moved to https://github.com/awspring/spring-cloud-aws