gpsData noArgConstructor for real beans

src/main/java/de/fuberlin/imp/memorybox/restmembox/model/GpsData.java

@@ -2,10 +2,12 @@ package de.fuberlin.imp.memorybox.restmembox.model;
 
 import lombok.AllArgsConstructor;
 import lombok.Data;
+import lombok.NoArgsConstructor;
 
 import javax.persistence.Column;
 import javax.persistence.Embeddable;
 
+@NoArgsConstructor
 @AllArgsConstructor
 @Data
 @Embeddable