Fixed CHICAGO: Bug 2121 - h5diff - incorrect and lack of output for the
different set of attributes (different number and names)
Description:
This is related to previous checkin r20294.
Add help page update for verbose option level feature, which displays
useful information about attribute difference with -v1, --verbose=1 -v2
or --verbose=2 option.
Tested:
jam (linux32-LE), amani (linux64-LE), heiwa (linuxppc64-BE), tejeda (mac32-LE), linew (solaris-BE)