Include option_parser and impala_shell_config_defaults in the Impala shell tarball.
Include option_parser and impala_shell_config_defaults in the Impala shell tarball.

This makes the shell package work; Previously, it threw import exception and exited.

Change-Id: Iec6a7a751311c66966fa5636c4d3a522ff15ab87
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/3699
Reviewed-by: Lenni Kuff <724b7df200764f5dc1b723c05ee6c6adabd11bb1@cloudera.com>
Reviewed-by: Ishaan Joshi <d1d1e60202ec9f2503deb1b724986485a125d802@cloudera.com>
Tested-by: Ishaan Joshi <d1d1e60202ec9f2503deb1b724986485a125d802@cloudera.com>

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