RFR 9 8058464 (process spec) ProcessBuilder.redirectXXX throws unspecified NPE

[Roger Riggs]

Please review this update to specify that ProcessBuilder methods throw 
NullPointerException
when arguments are null.  The implementation behavior is unchanged and 
correct
but the specification of NPE is missing for methods redirectInput, 
redirectOutput, and redirectError.

The choice of a single class javadoc statement applies to all methods 
and @throws clauses
on individual methods are redundant.

Webrev:
     http://cr.openjdk.java.net/~rriggs/webrev-npe-8058464/

Issue:
    8058464 (process spec) ProcessBuilder.redirectXXX throws unspecified 
NPE <https://bugs.openjdk.java.net/browse/JDK-8058464>

Roger