ClickHouse dictionaries with connection credentials substituted from another file

_etc_clickhouse-server_dict_sources.xml

<?xml version="1.0"?>
<yandex>

    <mysql_config>
        <port>3306</port>
        <user>user</user>
        <password>123</password>
        <replica>
            <host>mysql_host</host>
            <priority>1</priority>
        </replica>
        <db>owa_config</db>
    </mysql_config>

</yandex>

_etc_clickhouse-server_dictonaries_customer.xml

<?xml version="1.0"?>
<yandex>
    <include_from>/etc/clickhouse-server/dict_sources.xml</include_from>
    <comment>....</comment>
    <dictionary>
        <name>customer</name>
        <source>
            <mysql incl="mysql_config">
                <table>customer</table>
                <invalidate_query>select concat(max(audit),count(*)) from customer</invalidate_query>
            </mysql>
        </source>
        <lifetime>
            <!-- every 8-12 h dict will be fully reloaded even if invalidate_query result doesn't change -->
            <min>10800</min>
            <max>43200</max>
        </lifetime>
        <layout>
            <flat />
        </layout>
        <structure>
            <id>
                <name>customerid</name>
            </id>
            <!-- usage: SELECT dictGetString('customer', 'company', toUInt64(505))  -->
            <attribute>
                <name>company</name>
                <type>String</type>
                <null_value></null_value>
            </attribute>
            <!-- usage: SELECT dictGetString('customer', 'email', toUInt64(505))  -->
            <attribute>
                <name>email</name>
                <type>String</type>
                <null_value></null_value>
            </attribute>
            <attribute>
                <name>status</name>
                <type>String</type>
                <null_value></null_value>
            </attribute>
        </structure>
    </dictionary>
</yandex>