Commits
David Young committed 0ea6e75d9ff
VFD SWMR sparse readers failed to open the .h5 file because the sparse writer had finished its work and closed the .h5 file, thus removing the shadow file. Make the sparse writer wait to close the .h5 file for a signal from testvfdswmr.sh. In testvfdswmr.sh, send the signal when the readers have all finished.