Do not set pid in BlockArr and BlockCyclicArr constructors
Merge pull request #207 from vasslitvinov/do-not-set-pid-in-BlockArr-and-BlockCyclicArr-ctors

Do not set pid in BlockArr and BlockCyclicArr constructors.

Not reviewed - analogous to the change in CyclicDist.chpl in SVN r22865.
"Rationale: 'pid' should be set when the object is privatized using
_newPrivatizedClass. Setting 'pid' to that of another already-
privatized object breaks some unspoken invariants/assumptions."

I have been meaning to do it for a while, finally got around to it.