Some types of audit event samples from [our documentation](https://www.elastic.co/guide/en/elasticsearch/reference/7.17/audit-event-types.html) include the port number in "origin.address", like **access_denied**:
```json
{"type":"audit", "timestamp":"2020-12-30T22:30:06,949+0200", "node.id":
"0RMNyghkQYCc_gVd1G6tZQ", "event.type":"transport", "event.action":
"access_denied", "authentication.type":"REALM", "user.name":"user1",
"user.realm":"default_native", "user.roles":["test_role"], "origin.type":
"rest", "origin.address":"[::1]:52434", "request.id":"yKOgWn2CRQCKYgZRz3phJw",
"action":"indices:admin/auto_create", "request.name":"CreateIndexRequest",
"indices":["<index-{now/d+1d}>"]}
```
but other types like **connection_denied** from this issue does not include the port:

```json
{"type":"audit", "timestamp":"2020-12-30T21:47:31,526+0200", "node.id":
"0RMNyghkQYCc_gVd1G6tZQ", "event.type":"ip_filter", "event.action":
"connection_denied", "origin.type":"rest", "origin.address":"10.10.0.20",
"transport.profile":".http", "rule":"deny 10.10.0.0/16"}
```

I think we should be consistent here and always include the port number in the "origin.address" field.
x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/audit/logfile/LoggingAuditTrailTests.java
String creatorRealmName = (String) authentication.getMetadata().get(AuthenticationField.API_KEY_CREATOR_REALM_NAME);
            if (creatorRealmName != null) {
                checkedFields.put(LoggingAuditTrail.PRINCIPAL_REALM_FIELD_NAME, creatorRealmName);
            }
        } else {
            if (authentication.isRunAs()) {
                checkedFields.put(LoggingAuditTrail.PRINCIPAL_REALM_FIELD_NAME, authentication.getLookedUpBy().getName())
                    .put(LoggingAuditTrail.PRINCIPAL_RUN_BY_FIELD_NAME, authentication.getAuthenticatingSubject().getUser().principal())
                    .put(LoggingAuditTrail.PRINCIPAL_RUN_BY_REALM_FIELD_NAME, authentication.getAuthenticatedBy().getName());
            } else {
                checkedFields.put(LoggingAuditTrail.PRINCIPAL_REALM_FIELD_NAME, authentication.getAuthenticatedBy().getName());
            }
        }
        if (authentication.isAuthenticatedWithServiceAccount()) {
            checkedFields.put(LoggingAuditTrail.SERVICE_TOKEN_NAME_FIELD_NAME, (String) authentication.getMetadata().get(TOKEN_NAME_FIELD))
                .put(
                    LoggingAuditTrail.SERVICE_TOKEN_TYPE_FIELD_NAME,
                    ServiceAccountSettings.REALM_TYPE + "_" + authentication.getMetadata().get(TOKEN_SOURCE_FIELD)
                );
        }
    }
    private static void opaqueId(ThreadContext threadContext, MapBuilder<String, String> checkedFields) {
        setFieldFromThreadContext(threadContext, checkedFields, Task.X_OPAQUE_ID_HTTP_HEADER, LoggingAuditTrail.OPAQUE_ID_FIELD_NAME);
    }
    private static void traceId(ThreadContext threadContext, MapBuilder<String, String> checkedFields) {
        setFieldFromThreadContext(threadContext, checkedFields, Task.TRACE_ID, LoggingAuditTrail.TRACE_ID_FIELD_NAME);
    }
    private static void forwardedFor(ThreadContext threadContext, MapBuilder<String, String> checkedFields) {
        setFieldFromThreadContext(
            threadContext,