Add old output files and ctests to see if we can still read them

[eisenhauer]

No description provided.

[eisenhauer]

Note I have not disturbed the "backward_compatibility" subdirectory which isn't actively involved in testing...

[vicentebolea]

For extracting these zipped bp files you could leverage cmake -E tar command: https://cmake.org/cmake/help/latest/manual/cmake.1.html#cmdoption-cmake-E-arg-tar

[eisenhauer]

For extracting these zipped bp files you could leverage cmake -E tar command:
Is there some reason to avoid the ARCHIVE_CREATE/EXTRACT functionality in the CMAKE file command? (With the caveat that I couldn't use ARCHIVE_CREATE because I needed more control over the zip command line to try to keep some info out of the archive. This is all due to trying to create archives that are identical except for actual changes in ADIOS file data...)

[vicentebolea]

For extracting these zipped bp files you could leverage cmake -E tar command:
Is there some reason to avoid the ARCHIVE_CREATE/EXTRACT functionality in the CMAKE file command? (With the caveat that I couldn't use ARCHIVE_CREATE because I needed more control over the zip command line to try to keep some info out of the archive. This is all due to trying to create archives that are identical except for actual changes in ADIOS file data...)

makes sense, file attributes architiving is tricky, I left some comment,

[eisenhauer]

OK, output and uniqueness testing again disabled until I sort discrepancies, but the remainder is significantly cleaned up. Request re-review.

[vicentebolea]

couple of little comments. everything else looks good