spark git commit: [SPARK-5444][Network]Add a retry to deal with the conflict port in netty server.

Repository: spark Updated Branches: refs/heads/branch-1.3 9fa29a629 - caca15a4c [SPARK-5444][Network]Add a retry to deal with the conflict port in netty server. If the `spark.blockMnager.port` had conflicted with a specific port, Spark will throw an exception and exit. So add a retry to

spark git commit: [SPARK-5444][Network]Add a retry to deal with the conflict port in netty server.

Repository: spark Updated Branches: refs/heads/master dcd1e42d6 - 2bda1c1d3 [SPARK-5444][Network]Add a retry to deal with the conflict port in netty server. If the `spark.blockMnager.port` had conflicted with a specific port, Spark will throw an exception and exit. So add a retry to avoid