Raise warning if name/notes supplied when adding Container to scratch

[rly]

Raise warning if name/notes supplied when adding Container to scratch (they are ignored), and add tests.

@ajtritt table_description appears not to be used in add_scratch?

[codecov]

Codecov Report

Merging #1038 into dev will decrease coverage by 0.15%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##              dev    #1038      +/-   ##
==========================================
- Coverage   71.37%   71.22%   -0.16%     
==========================================
  Files          37       37              
  Lines        2774     2780       +6     
  Branches      547      550       +3     
==========================================
  Hits         1980     1980              
- Misses        670      676       +6     
  Partials      124      124

Impacted Files	Coverage Δ
src/pynwb/core.py	73.49% <ø> (ø)	⬆️
src/pynwb/file.py	71.03% <0%> (-1.74%)	⬇️

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[ajtritt]

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