JDK 8 M6/M7 JEP updates

[mark.reinhold at oracle.com]

Work on the following JEPs will not complete in time for JDK 8, so
their owners have requested to drop them from the release:

  108 Collections Enhancements from Third-Party Libraries
  156 G1 GC: Reduce need for full GCs

Additionally, the owner of JEP 110 (New HTTP Client) has asked that
it be dropped from JDK 8 because the new API has grown large enough
to require its own JSR [1].

Work on these JEPs will not complete in M6, but the remaining work
is well-understood and relatively low-risk, so I've retargeted them
to M7:

  107 Bulk Data Operations for Collections
  123 Configurable Secure Random-Number Generation
  155 Concurrency Updates
  171 Fence Intrinsics

Finally, I've targeted two additional small JEPs to M6:

  164 Leverage CPU Instructions for AES Cryptography
  173 Retire Some Rarely-Used GC Combinations

I've updated the milestone and feature pages [2][3] accordingly.

- Mark


[1] http://mail.openjdk.java.net/pipermail/jdk8-dev/2012-December/001804.html
[2] http://openjdk.java.net/projects/jdk8/milestones
[3] http://openjdk.java.net/projects/jdk8/features