[lworld] RFR (XS): 8203291 - ValueTypeArray.java fails with "RuntimeException: Expected NPE"

[David Simms]

RFR:

http://cr.openjdk.java.net/~dsimms/valhalla/8203291/

Re-enabled test of array copy for objArray to objArray of Value Type 
element klass (i.e. non-flat value array)

Minor fix adds null and type checks...test passes, tier 1 hs and jdk 
tests run.

There is some further clean up, reunification work to be done in this 
area. Obviously needs more thoughtful work with the Access API, but we 
can afford to defer for now. Hence comments in the ValueArrayKlass, get 
all the required use cases in code first, clean up later.

Cheers

/David Simms