Changed datamodel, integrated poll configuration into tenant meta data table

* updated sql scripts to update new collums
* updated coressponding JPA class TenantMetaData

Signed-off-by: Nonnenmacher Fabian <fabian.nonnenmacher@bosch-si.com>

hawkbit-core/src/main/java/org/eclipse/hawkbit/ControllerPollProperties.java

@@ -13,8 +13,6 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
 /**
  * Defines the polling time for the controllers in HH:MM:SS notation.
  * 
- *
- *
  */
 
 @ConfigurationProperties(prefix = "hawkbit.controller")
@@ -38,5 +36,4 @@ public class ControllerPollProperties {
     public void setPollingOverdueTime(final String pollingOverdue) {
         this.pollingOverdueTime = pollingOverdue;
     }
-
 }