Non static native query prefix (#2152)

Signed-off-by: Avgustin Marinov <Avgustin.Marinov@bosch.com>

hawkbit-repository/hawkbit-repository-jpa-eclipselink/src/main/java/org/eclipse/hawkbit/repository/jpa/Jpa.java

@@ -33,7 +33,9 @@ public class Jpa {
         log.info("JPA vendor: {}", JPA_VENDOR);
     }
 
-    public static final char NATIVE_QUERY_PARAMETER_PREFIX  = '?';
+    public static char nativeQueryParamPrefix() {
+        return '?';
+    }
 
     public static <T> String formatNativeQueryInClause(final String name, final Collection<T> collection) {
         return formatEclipseLinkNativeQueryInClause(IntStream.range(0, collection.size()).mapToObj(i -> name + "_" + i).toList());