Use impala-python when building shell tarball
Use impala-python when building shell tarball

This is a minor build fix that allows buildall.sh to succeed on systems
where setuptools isn't installed for system python.

Change-Id: I33a24ea4f77e655acaa0de22211c9ef008f5e650
Reviewed-on: http://gerrit.cloudera.org:8080/3797
Reviewed-by: Tim Armstrong <2f8e34250f03a653da3dc27f7ec203eafdde80fc@cloudera.com>
Tested-by: Internal Jenkins

cloudera/Impala,cloudera/Impala,michaelhkw/incubator-impala,michaelhkw/incubator-impala,cloudera/Impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,michaelhkw/incubator-impala