[SPARK-22889][SPARKR] Set overwrite=T when install SparkR in tests #20060
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What changes were proposed in this pull request?
Since all CRAN checks go through the same machine, if there is an older partial download or partial install of Spark left behind the tests fail. This PR overwrites the install files when running tests. This shouldn't affect Jenkins as
SPARK_HOME
is set when running Jenkins tests.How was this patch tested?
Test manually by running
R CMD check --as-cran