When generating local seeds for random number generators with an offset, use a different offset for each seed.

Updated kubo_integer_dimensions_mpi test case results because its seeds changed.

git-svn-id: svn+ssh://svn.code.sf.net/p/xmds/code/trunk/xpdeint@2889 41b19578-b77a-4e3b-9682-c8570d237623