hdf5_ep

[svn-r17380] Description:
	Bring r17376 from trunk to 1.8 branch:

	Make similar change to windows VFD as sec2 VFD, when converting from
a family file to a single file.

	Tweak file sizes expected for parallel tests.

Tested on:
	FreeBSD/32 6.3 (duty) w/debug
	(h5committested on trunk)