Using spark default parallelism as default

[davidrabinowitz]

No description provided.

[davidrabinowitz]

/gcbrun

[codecov]

Codecov Report

Merging #668 (377abbb) into master (6b96f81) will decrease coverage by 0.10%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #668      +/-   ##
==========================================
- Coverage   19.26%   19.16%   -0.11%     
==========================================
  Files         135      135              
  Lines        5206     5187      -19     
  Branches      598      587      -11     
==========================================
- Hits         1003      994       -9     
+ Misses       4140     4130      -10     
  Partials       63       63              

Flag	Coverage Δ
integrationtest-2.12	20.17% <0.00%> (-0.01%)	⬇️
integrationtest-2.4	17.98% <0.00%> (-0.01%)	⬇️
integrationtest-3.1	17.61% <0.00%> (-0.01%)	⬇️
nightly	?
unittest	19.16% <0.00%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
.../bigquery/connector/common/ReadSessionCreator.java	0.00% <0.00%> (ø)
...com/google/cloud/spark/bigquery/BigQueryUtil.scala	46.15% <0.00%> (-3.85%)	⬇️
...ud/spark/bigquery/pushdowns/BigQueryStrategy.scala	50.84% <0.00%> (-2.38%)	⬇️
...bigquery/pushdowns/SparkBigQueryPushdownUtil.scala	68.96% <0.00%> (-1.04%)	⬇️
...ud/spark/bigquery/pushdowns/BigQuerySQLQuery.scala	89.23% <0.00%> (-0.33%)	⬇️
...loud/spark/bigquery/pushdowns/SortLimitQuery.scala	95.23% <0.00%> (-0.22%)	⬇️
.../bigquery/pushdowns/SparkExpressionConverter.scala	91.19% <0.00%> (-0.05%)	⬇️
...le/cloud/spark/bigquery/BigQueryStreamWriter.scala	0.00% <0.00%> (ø)
...le/cloud/spark/bigquery/examples/Shakespeare.scala	0.00% <0.00%> (ø)
...gle/cloud/spark/bigquery/BigQueryWriteHelper.scala	2.53% <0.00%> (+0.23%)	⬆️

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