Provide Leader election algorithm

[himadieievsv]

Summary
It nice to have Leader election algorithm too.
Basic requirements:
TBD

Motivation
Currently it is possible to have only one node in luster to perform workload using locks, but it have many drawbacks for using that approach in cluster with different types of nodes (computing power, network bandwidth, memory capacity, etc ). Ideally nodes should vote on the best candidate.

Workaround
Use locks