COOPR-581: add MetricHandler
COOPR-581: improve date constants usage
COOPR-581: code improvements
COOPR-581: add java docs
COOPR-581: refactored tests to use new ClusterTask constructor
COOPR-581: fix code due to netty-http logic and improve statement creation
COOPR-581: update PR and add unit tests
COOPR-581: update PR
COOPR-581: add TODO
COOPR-581: update PR
COOPR-581: update PR
COOPR-581: add TODO for db changes
Merge pull request #757 from cybervisiontech/coopr-581

COOPR-581: Implement node hours REST API