hdf5_ep

[svn-r9442] Purpose:
Add code more code to test H5Pget_data_transform and H5Pset_data_transform

Description:
Added a test to verify that H5Pset_data_transform will correctly replace a
data transform with a new one and properly use the new transform on the data.

Added a test to verify that H5Pget_data_transform properly returns the
transform string.

Platforms tested:
sol + eirene + copper

Misc. update: