fix bug in shapesame test where test fails with more than 10
procs. This is a fix in the test itself and does not have to do with
the library code.

tested cloud machine with parallel.



git-svn-id: https://svn.hdfgroup.uiuc.edu/hdf5/trunk@25790 dab4d1a6-ed17-0410-a064-d1ae371a2980