Initial Contribution of the rollout-management feature

- Repository functionality for rollout, rolloutgroup entities
- Rollout scheduler to watch and handle running rollouts and start next
group of rollout
- Vaadin view to administrate rollouts and reflect the current rollout
status
- REST resources to cover rollout creation, updating, starting, pausing
and resuming

Signed-off-by: Michael Hirsch <michael.hirsch@bosch-si.com>

pom.xml

@@ -406,6 +406,16 @@
             <artifactId>tokenfield</artifactId>
             <version>7.0.1</version>
          </dependency>
+         <dependency>
+            <groupId>org.vaadin.alump.distributionbar</groupId>
+            <artifactId>dbar-addon</artifactId>
+            <version>1.2.0</version>
+         </dependency>
+         <dependency>
+            <groupId>org.vaadin.addons</groupId>
+            <artifactId>contextmenu</artifactId>
+            <version>4.5</version>
+         </dependency>
 
          <!-- Misc -->
          <dependency>