Allow elasticsearch to be deployed on dedicated nodes with tolerations and nodeselector options

[dmitrievav]

• Making elasticsearch endpoint accessible through the ingress
• Allow elasticsearch to be deployed on dedicated nodes with tolerations and nodeselector options
• Removed trailing spaces

[dmitrievav]

Attaching a feature request https://github.com/clockworksoul/helm-elasticsearch/issues/53

[dmitrievav]

Please let me know if you would like me to squash everything in single commit

[dmitrievav]

Removed conflict changes. Rebased and squashed to single commit.