increase timeout for downloading Spark/Livy releases (#2816)
increase timeout for downloading Spark/Livy releases (#2816)

Signed-off-by: Yitao Li <506e136862ca6a2cd6209c2ab7376874a235e7c2@rstudio.com>
rstudio/sparklyr,rstudio/sparklyr,rstudio/sparklyr,rstudio/sparklyr