test: changing logger.exception to logger.errors in databases api

[AAfghahi]

SUMMARY

Changing the logger.exception in databases to logger.error in order to better read the logs and see what information the client is passing in on a failed import.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TEST PLAN

ADDITIONAL INFORMATION

[codecov]

Codecov Report

Merging #13751 (08392c8) into master (9773aba) will increase coverage by 1.56%.
The diff coverage is 0.00%.

❗ Current head 08392c8 differs from pull request most recent head 36b9f63. Consider uploading reports for the commit 36b9f63 to get more accurate results

@@            Coverage Diff             @@
##           master   #13751      +/-   ##
==========================================
+ Coverage   75.91%   77.47%   +1.56%     
==========================================
  Files         933      933              
  Lines       47185    47186       +1     
  Branches     5872     5872              
==========================================
+ Hits        35821    36558     +737     
+ Misses      11191    10486     -705     
+ Partials      173      142      -31     

Flag	Coverage Δ
cypress	56.26% <ø> (+10.24%)	⬆️
hive	80.25% <0.00%> (ø)
mysql	80.56% <0.00%> (ø)
postgres	80.59% <0.00%> (ø)
presto	80.25% <0.00%> (-0.01%)	⬇️
python	81.10% <0.00%> (-0.01%)	⬇️
sqlite	80.15% <0.00%> (ø)

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Impacted Files	Coverage Δ
superset/databases/api.py	92.03% <0.00%> (ø)
superset/datasets/api.py	91.44% <0.00%> (ø)
superset/db_engine_specs/presto.py	88.28% <0.00%> (-0.42%)	⬇️
...perset-frontend/src/views/CRUD/chart/ChartList.tsx	84.49% <0.00%> (+0.77%)	⬆️
superset-frontend/src/components/ListView/utils.ts	85.95% <0.00%> (+0.82%)	⬆️
.../src/explore/components/ControlPanelsContainer.tsx	97.27% <0.00%> (+0.90%)	⬆️
superset-frontend/src/components/Select/styles.tsx	86.30% <0.00%> (+1.36%)	⬆️
superset-frontend/src/chart/Chart.jsx	64.81% <0.00%> (+1.85%)	⬆️
...-frontend/src/dashboard/actions/dashboardLayout.js	98.03% <0.00%> (+1.96%)	⬆️
...frontend/src/dashboard/reducers/dashboardLayout.js	99.00% <0.00%> (+2.00%)	⬆️
... and 94 more

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