avoid race condition for deploy/undeploy events
Obtain stream list from deployments path

When a new container joins the cluster the admin will determine
if a module should be deployed to it. This change ensures that
only deployed streams will have their modules considered for
deployment.
XD-1481 - Remove spring-xd-analytics-ml-pmml project

Removed from the build.
Updated spring-xd-analytics-ml with implementation/tests in https://github.com/thomasdarimont/spring-xd/tree/feature/XD-1420
Fix UI build dependent task

- Make `:spring-xd-dirt:installApp` dependsOn `:spring-xd-ui:setupUI`
XD-1469: Fix aggreator correlation
Upgrade to Spring Boot 1.0.1