Transition hm_next to ruby 1.9.3

Bump hm_next to:
- use new eventmachine
- use fully qualifed constant names

git shortlog hm_next:

Bob Nugmanov and Maria Shaldibina (2):
  Refactor specs
  Bump eventmachine to 1.0.0

Change hm_next job spec to use ruby_next (1.9.3)

Change-Id: Iae13099051155290c5f73a7076fc3365d3be29a8
bump health_manager: bulk_api improvements

shortlog:

Bob Nugmanov (1):
      fix: bulk_api loop duration calculation

Bob Nugmanov, David Sabeti and Max Brunsfeld (1):
      bulk API retry logic

Matt Reider (1):
      Update README.md

Change-Id: I435e6536411f5952d89755b3e7ba8b8737dcf18c
bump health_manager_next

shortlog:

Bob Nugmanov (1):
      fix: bulk: refresh credentials
bump hm_next (minor fix)

shortlog:

Bob Nugmanov & Matthew Boedicker (1):
      fix queing key for start messages
bump hm (return droplet)

shortlog:

Bob Nugmanov & Matthew Boedicker (1):
      Return droplet state over nats.