GroupManager: return the deployment plan instead of the resulting group.
DeploymentsResource: use simple update for cancel
GroupsResource: creation can be forced as well
GroupsResource: create deployment response
GroupUpdate: when updating to a version, pass the version to the application  as well
IntegrationFunSuite: fix and extend cleanUp, remove zookeeper state before running the tests, waitFor deployments to get finished
MarathonFacade: use new deployment result in interface
GroupDeployIntegrationTest: use the new waitForChange instead of waitForEvent