IMPALA-4407: Move Impala setup procedures to main repo
IMPALA-4407: Move Impala setup procedures to main repo

Before this change, Impala has relied on a chef setup in
https://github.com/awleblang/impala-setup for setting up a development
environment. This has a number of downsides:

1. It makes understanding what the script is doing difficult: there
are 40k or so lines in that repo last I checked.

2. It makes porting to new distributions difficult unless the
providers of various chef "recipes" have already ported their code.

3. It makes coordinated changes between the main repo and the
impala-setup repo more awkward.

This patch adds a shell script to replace that repo. It works on
Ubuntu 14.04 and 16.04, while impala-setup repo only works on 14.04
and the now-unmaintained Ubuntu 15.04.

Change-Id: I728abfa806ecd9461dfb443278c2a464714d984c
Reviewed-on: http://gerrit.cloudera.org:8080/7587
Reviewed-by: Jim Apple <396f577ccd0f19e47f0fb44dae1d6fc43cc20400@apache.org>
Tested-by: Impala Public Jenkins

cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala