Changes for April 2017 CPU release (8u131) synced into FX 8u-dev and 9-dev

[Kevin Rushforth]

I have synced the OpenJFX changes from the just-released April 2017 CPU 
release (8u131) into 8u and into 9. I have further synced all changes 
from 9 into 10.

Here is a webrev of the FX 8u131 changes for those who are interested in 
the changes, but don't want to wade through the separate changesets I 
just pushed (most of which are tag or merge changesets).

http://cr.openjdk.java.net/~kcr/8u131-8u-sync/webrev/

The webrev for 9 is similar except for the .hgtags (which are unmodified 
in 9), but here it is if anyone is interested:

http://cr.openjdk.java.net/~kcr/9-cpu-1702-sync/webrev/

-- Kevin