RFR: 8153332 - Stream API: Fuse sorted().limit(n) into single operation

[Tagir F. Valeev]

Hello!

Please review the following enhancement:
https://bugs.openjdk.java.net/browse/JDK-8153332
http://cr.openjdk.java.net/~tvaleev/webrev/8153332/r1/

It was earlier discussed here:
http://mail.openjdk.java.net/pipermail/core-libs-dev/2016-March/039308.html

The motivation and algorithm are briefly described in the JIRA issue
description.

Visible behavior should not change after this patch, so all the
existing tests pass. I added some more tests to focus on
sorted().limit() chain.

Again here's some performance tests which were presented in earlier
discussion:
http://cr.openjdk.java.net/~tvaleev/patches/sortedLimit/jmh/
http://cr.openjdk.java.net/~tvaleev/patches/sortedLimit/jmh/summary.txt

With best regards,
Tagir Valeev.