Add constraint to the database column maxAssignment

Signed-off-by: Melanie Retter <melanie.retter@bosch-si.com>

hawkbit-core/src/main/java/org/eclipse/hawkbit/exception/AbstractServerRtException.java

@@ -9,11 +9,7 @@
 package org.eclipse.hawkbit.exception;
 
 /**
- *
- *
- *
  * Generic Custom Exception to wrap the Runtime and checked exception
- *
  */
 public abstract class AbstractServerRtException extends RuntimeException {
 

hawkbit-core/src/main/java/org/eclipse/hawkbit/exception/SpServerError.java

@@ -9,11 +9,7 @@
 package org.eclipse.hawkbit.exception;
 
 /**
- *
- *
- *
  * Define the Error code for Error handling
- *
  */
 
 public enum SpServerError {
@@ -25,7 +21,10 @@ public enum SpServerError {
     *
     */
     SP_REPO_ENTITY_ALRREADY_EXISTS("hawkbit.server.error.repo.entitiyAlreayExists", "The given entity already exists in database"),
-
+    /**
+    *
+    */
+    SP_REPO_CONSTRAINT_VIOLATION("hawkbit.server.error.repo.constraintViolation", "The given entity violates a constraint"),
     /**
      * 
      */