First implemtation of REST-API

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

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

@@ -65,6 +65,19 @@ public enum SpServerError {
     */
     SP_REST_SORT_PARAM_INVALID_DIRECTION("hawkbit.server.error.rest.param.invalidDirection",
             "The given sort parameter direction does not exist"),
+
+    /**
+     * 
+     */
+    SP_REST_CONFIG_POLLING_TIME_WRONG_FOMRATTED("hawkbit.server.error.rest.param.invalidFormat",
+            "The given overdue polling time or polling time parameter are not formatted correctly."),
+
+    /**
+     * 
+     */
+    SP_REST_CONFIG_INVALID_DS_TYPE("hawkbit.server.error.rest.param.invalidFormat",
+            "The given default distribution set type does not exist."),
+
     /**
     *
     */