The grand Guice injection fixup

This branch will get all the Guice changes to make DI work correctly and eliminate all the race conditions and have the startup and shutdown of the service controlled by the dropwizard framework.

The first patch is fixing all the lazy injection places, add explicit injection for everything that is referenced through Guice and uses eager injection everywhere.
btw, looking at the four subclasses (CleanupPoller, CooldownPoller, DeployPoller and TaskReconcilliationPoller), not a single one actually *uses* the MesosScheduler passed in here.  So checking in the superclass to ensure that the action does not get called at all might be a good thing.