Upgrade Drill to v1.7 on MapR

[MattK]

I would like to upgrade Drill on my new MapR Community cluster 
(v.5.1.0.37549.GA) to apply 
https://issues.apache.org/jira/browse/DRILL-4317 but the docs seem to 
take an "yum install" approach where Drill 1.7 is not in the MapR repos.

Is there a set of docs for performing a Drill upgrade from the package 
from drill.apache.org ?