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
assertThat(
            LoggingAuditTrail.FILTER_POLICY_IGNORE_PRINCIPALS.getConcreteSettingForNamespace("filter2").get(settings5),
            containsInAnyOrder("tom", "cruise")
        );
        e = expectThrows(
            IllegalArgumentException.class,
            () -> LoggingAuditTrail.FILTER_POLICY_IGNORE_ACTIONS.getConcreteSettingForNamespace("filter2").get(settings5)
        );
        assertThat(e, hasToString(containsString("invalid pattern [/foo]")));
    }
    public void testSecurityConfigChangeEventFormattingForRoles() throws IOException {
        final Path path = getDataPath("/org/elasticsearch/xpack/security/audit/logfile/audited_roles.txt");
        final Map<String, String> auditedRolesMap = new HashMap<>();
        try (
            BufferedReader reader = new BufferedReader(
                new InputStreamReader(new BufferedInputStream(Files.newInputStream(path)), StandardCharsets.UTF_8)
            )
        ) {
            String line;
            while ((line = reader.readLine()) != null) {
                
                auditedRolesMap.put(line, reader.readLine());
            }
        }
        RoleDescriptor nullRoleDescriptor = new RoleDescriptor(
            "null_role",
            randomFrom((String[]) null, new String[0]),
            randomFrom((RoleDescriptor.IndicesPrivileges[]) null, new RoleDescriptor.IndicesPrivileges[0]),
            randomFrom((RoleDescriptor.ApplicationResourcePrivileges[]) null, new RoleDescriptor.ApplicationResourcePrivileges[0]),
            randomFrom((ConfigurableClusterPrivilege[]) null, new ConfigurableClusterPrivilege[0]),