Code cleanup & refactoring
Description:
Use H5E_BEGIN_TRY/H5E_END_TRY macros around blocks where errors shouldn't
be printed, instead of managing 'automatic error' information.
Changes to use new 'flags' fields in the table of objects, since the 'objno'
field can't be [ab]used any longer.
Platforms tested:
h5committested
21c1f05808