YARN support for Drill

This is a tracking item to make Drill work with YARN.
Below are few requirements/needs to consider.

• Drill should run as an YARN based application, side by side with other YARN enabled applications (on same nodes or different nodes). Both memory and CPU resources of Drill should be controlled in this mechanism.
• As an YARN enabled application, Drill resource consumption should be adaptive to the load on the cluster. For ex: When there is no load on the Drill , Drill should consume no resources on the cluster. As the load on Drill increases, resources permitting, usage should grow proportionally.
• Low latency is a key requirement for Apache Drill along with support for multiple users (concurrency in 100s-1000s). This should be supported when run as YARN application as well.