RFR: JDK-8012650 and JDK-8011918

[Henry Jen]

Hi,

Please review static Stream factory methods and methods for Arrays.
Webrev is at

http://cr.openjdk.java.net/~henryjen/tl/8012650-8011918.0

Stream methods are covered in a test suite which will be put back soon
once all depends part is in place.

Arrays setAll and parallelSetAll methods has test included.

Cheers,
Henry