thesaurus_id: update keywords.csv and db revision

[AlexDo1]

In table keywords, column thesaurus_id was always [null], as the column thesaurus_id was missing in initial data data/keywords.csv. Currently, only GCMD thesaurus is implemented, so thesaurus_id should always be 1.

• Updated keywords.csv with column thesaurus_id = 1
• DB revision

[codecov[bot]]

Codecov Report

Merging #197 (be463b0) into master (d58dc85) will decrease coverage by 0.04%. The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master     #197      +/-   ##
==========================================
- Coverage   61.44%   61.40%   -0.05%     
==========================================
  Files          72       73       +1     
  Lines        3382     3394      +12     
==========================================
+ Hits         2078     2084       +6     
- Misses       1304     1310       +6     

Flag	Coverage Δ
e2e	61.40% <50.00%> (-0.05%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
metacatalog/db/revisions/__init__.py	100.00% <ø> (ø)
metacatalog/db/revisions/rev13.py	50.00% <50.00%> (ø)

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