Backport AutoValue integration

[swegner]

No description provided.

[swegner]

R: @lukecwik
CC: @tgroh

[swegner]

Travis failure seems to be a flake:

Downloaded: https://repo.maven.apache.org/maven2/com/google/collections/google-collections/1.0/google-collections-1.0.jar (625 KB at 960.9 KB/sec)

[INFO] Changes detected - recompiling the module!

[INFO] Compiling 472 source files to /Users/travis/build/GoogleCloudPlatform/DataflowJavaSDK/sdk/target/classes

No output has been received in the last 10m0s, this potentially indicates a stalled build or something wrong with the build itself.

The build has been terminated

PTAL @lukecwik

[davorbonaci]

Do we need this backport?

[swegner]

re: @davorbonaci

Do we need this backport?

There have been a number of backported changes that needed manual merge work to un-AutoValue them, and @tgroh mentioned he has more in the pipeline. This isn't strictly required but should be relatively low-risk and make other backports easier.

[davorbonaci]

Sure; ok to proceed with caution.

[swegner]

I've addressed all feedback so far. Please take another look. @lukecwik

[lukecwik]

Please fix indentation

[swegner]

Note: this has already been addressed in BEAM via apache/beam@119812a

[swegner]

I've addressed all feedback so far. Please take another look. @lukecwik

[swegner]

I've addressed all feedback so far. Please take another look. @lukecwik

[lukecwik]

LGTM

[lukecwik]

Waiting on travis and then will merge.

[lukecwik]

Can you sync your PR since there is a merge conflict now?

[swegner]

done. @lukecwik