LU-527 build: update ChangeLog for recent releases

LU-527 build: update ChangeLog for recent releases

Update the lustre/ChangeLog:
- list supported kernel versions in descending order so that it is
  more clear which is the newest and oldest versions.
- change "Patchless Client" URL (which is very old news) to point
  to the "Lustre Support Matrix" page.
- update actual release date of Lustre 2.1

Update the lnet/ChangeLog:
- remove mention of old and obsolete LNDs entirely
- move some LNDs to "Available but unsupported:" for clarity
- indicate Lustre 2.1.0 was released
- add TBD Lustre 2.2.0 release block

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I623d9c0693763dce7448b5829a1ca16ee92ab048
Reviewed-on: http://review.whamcloud.com/1710
Tested-by: Hudson
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>