spark git commit: [SPARK-9858][SQL] Add an ExchangeCoordinator to estimate the number of post-shuffle partitions for aggregates and joins (follow-up)

Repository: spark Updated Branches: refs/heads/branch-1.6 fba48e733 -> 089ba81d1 [SPARK-9858][SQL] Add an ExchangeCoordinator to estimate the number of post-shuffle partitions for aggregates and joins (follow-up) https://issues.apache.org/jira/browse/SPARK-9858 This PR is the follow-up work

spark git commit: [SPARK-9858][SQL] Add an ExchangeCoordinator to estimate the number of post-shuffle partitions for aggregates and joins (follow-up)

Repository: spark Updated Branches: refs/heads/master c048929c6 -> 8211aab07 [SPARK-9858][SQL] Add an ExchangeCoordinator to estimate the number of post-shuffle partitions for aggregates and joins (follow-up) https://issues.apache.org/jira/browse/SPARK-9858 This PR is the follow-up work of