We need lsb_release to detect the linux distribution

Change-Id: If7d756c73ce446ad9404920347bb975153a962e4
Reviewed-on: http://review.couchbase.org/43836
Tested-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Dave Rigby <daver@couchbase.com>