fix: adding hadoop dependency to impala metadata

Should fix 'Cookbook hadoop not found' error in many cases

Refs:

https://infochimps-developer.atlassian.net/browse/IT-82
https://www.pivotaltracker.com/story/show/67340856

Squashed commit of the following:

commit 26efcb657d507be61d1d0ded45a465ff0ef5b03c
Author: Eric Katerman <eric@infochimps.com>
Date:   Wed Mar 12 14:02:59 2014 -0700

    adding hadoop dependency to impala metadata

    Change-Id: I59e85d6f7790b3240e0ba8d8add11d819eb287cc

Change-Id: I9e8818b5395f5a58b06d5686c3a3d7f65754db87
Merge "fix: adding hadoop dependency to impala metadata"