hdf5

[svn-r19412] Modified shape same tests to deal with the performance problem on Abe.

Problem appears to have been caused by file system contention.

In the chunked dataset case, reshaping the chunks so that only one 
process would touch each chunk and setting the alignment equal to the
default Lustre block size more or less dealt with the problem.

For contiguous datasets, the problem was a bit more difficult, as
re-working the test to avoid contention would have been very time
consuming.

Instead, I added code to time one execution of each type of shape 
same test, and skip additional tests of that type if the duration
of the test exceeded some threshold

In all cases, I set up code to turn off the above fixes if express
test is 0.

Tested on Abe and commit tested.  On the commit test, the configure
test failed -- probably because I was h5committest from heiwa due
to some ssh wierdness.  In any case a manual reconfigure run on 
jam seemed to work fine.

Also, in h5committest, I ran into some data conversion warnings.
I didn't worry about them as the only code I changed was in testpar.