Enhance error checking for szip H5DataIO settings

[oruebel]

Motivation

Enhance error checking for SZIP parameters in H5DataIO and address suggestions from @rly in #167 that did not make it in before that PR was merged

Checklist

• Have you checked our Contributing document?
• Have you ensured the PR description clearly describes problem and the solution?
• Is your contribution compliant with our coding style ? This can be checked running flake8 from the source directory.
• Have you checked to ensure that there aren't other open Pull Requests for the same change?
• Have you included the relevant issue number using #XXX notation where XXX is the issue number ? By including "Fix #XXX" you allow GitHub to close the corresponding issue.

[rly]

Looks good. Never seen |= used before. Neat!

[codecov]

Codecov Report

Merging #168 into dev will increase coverage by 0.01%.
The diff coverage is 84.61%.

@@            Coverage Diff             @@
##              dev     #168      +/-   ##
==========================================
+ Coverage   70.02%   70.03%   +0.01%     
==========================================
  Files          30       30              
  Lines        5802     5811       +9     
  Branches     1367     1368       +1     
==========================================
+ Hits         4063     4070       +7     
- Misses       1303     1305       +2     
  Partials      436      436

Impacted Files	Coverage Δ
src/hdmf/backends/hdf5/h5_utils.py	63.18% <84.61%> (+0.68%)	⬆️

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