migrate from AWS SDK 1.x to AWS SDK 2.x

[sullis]

No description provided.

[sullis]

work in progress. FYI @jrduncans

[jrduncans]

This might be better as an additional module than an upgrade. I foresee both versions of the AWS SDK coexisting for a while.

[sullis]

fyi: Java applications can use both SDKv1 and SDKv2 at the same time. Both AWS SDK's can co-exist on the classpath.

from this presentation: https://speakerdeck.com/sullis/aws-sdk-for-java-version-2-dot-0-dawscon-2019

[jrduncans]

That's true, but was I still thinking people would prefer to pick the one they use rather than add additional dependencies, worry about any configuration differences, etc.

But perhaps I can see the point of view that the modules Moirai provides should be for the datastore, not the library used to access the datastore, and therefore we only need one S3 module and can change the implementation (although it will be a breaking change for construction).

[jrduncans]

Redid this as part of #16

[sullis]

cool! @jrduncans