[SYNCOPE-1978] Fixing column name after backport

Author: ilgrosso

core/persistence-jpa/src/main/java/org/apache/syncope/core/persistence/jpa/dao/JPAAuditEventDAO.java

@@ -78,7 +78,7 @@ public AuditEventCriteriaBuilder username(final Set<String> username, final List
                 query.append(andIfNeeded()).append("(").
                         append(username.stream().map(value -> {
                             String pattern = "%\"username\":\"" + escapeForLike(value) + "\"%";
-                            return "(beforeValue LIKE ?" + setParameter(parameters, pattern) + " ESCAPE '#'"
+                            return "(before_value LIKE ?" + setParameter(parameters, pattern) + " ESCAPE '#'"
                                     + " OR inputs LIKE ?" + setParameter(parameters, pattern) + " ESCAPE '#'"
                                     + " OR output LIKE ?" + setParameter(parameters, pattern) + " ESCAPE '#'"
                                     + " OR throwable LIKE ?" + setParameter(parameters, pattern) + " ESCAPE '#')";