Apply signalfx changes again

[maven-release-plugin] copy for tag 3.4.0

[maven-release-plugin] copy for tag 3.3.2

[maven-release-plugin] copy for tag 3.3.1

[maven-release-plugin] copy for tag 4.0.0-alpha2

[maven-release-plugin] copy for tag 4.0.0-alpha1

[maven-release-plugin] copy for tag 3.3.0

Merge pull request signalfx#3 from signalfx/upgrade-guava

Upgrade to java 8, guava 21 and rename deliverables

[maven-release-plugin] copy for tag 3.2.0

[maven-release-plugin] copy for tag 3.1.4