Commits
Merging in latest from upstream (HDFFV/hdf5:refs/heads/develop) * commit '23460c30f10e098a980c5466b6108269d2fd92f6': Moved the SWMR + cache image check up before the root group is constructed to avoid the special case close. Moved the 'cache image + SWMR' check from H5Fcreate/open to H5F_open. Prep for the VOL merge.