STORM-1539 - Improve Storm ACK-ing performance

[roshannaik]

Implemented the ACK-ing logic in Java.
See Jira for profiler info on performance boost.

[Parth-Brahmbhatt]

+1.

[HeartSaVioR]

Nice, +1
According to https://gist.github.com/tolitius/1721519, maybe we can try recursive approach to improve performance if we want to stick in clojure. But now we don't need to, and this PR is clearer.

[roshannaik]

I was able to run the unit tests successfully for this.. but wanted to ensure a committer is able to review the Java ACKing logic implementation and confirm it looks good.

[ptgoetz]

+1

I haven't looked at the conflicts yet, But we may need separate pull requests for the mast and 1.x branches. But that should be trivial.

Can you add this to STORM-1491?

[satishd]

+1

[roshannaik]

Added it to STORM-1491.
The PR for 1.x branch is #1105

[roshannaik]

will update PR by removing unused clojure function and squashing commits.

[revans2]

+1 please have a version for 1.x, and please upmerge for 2.x.

[roshannaik]

@revans2 as mentioned, the PR for 1.x version is #1105

[roshannaik]

@revans2 .. PR updated after rebase to master branch

[HeartSaVioR]

+1 again

[revans2]

+1