============================================================================
    source.vum:
        This section describes the source VUM that you want to upgrade.
    ----------------------------------------------------------------------------
        ========================================================================
        run.migration.assistant:
            This subsection describes the os credentials of the source Windows
            VUM installation and the ESXi host on which the source Windows VUM
            is running. Provide this subsection only when you want to install
            and run Migration Assistant automatically.
        ------------------------------------------------------------------------
            esxi.hostname:
                IP address or fully qualified domain name (FQDN) of the ESXi
                host. If an FQDN is provided, it has to be resolvable from the
                machine that is running the installer.
                Type: string
            esxi.username:
                Username of a user with administrative privileges on the ESXi
                host.
                Type: string
            esxi.password:
                The password of the ESXi host user. If left blank, or omitted,
                you will be prompted to enter it at the command console during
                template verification.
                Type: string
            esxi.port:
                The port number of the ESXi host. The default value is 443.
                Type: integer
            vum.hostname:
                IP address or fully qualified domain name (FQDN) of the VUM
                host. If an FQDN is provided, it has to be resolvable from the
                machine that is running the installer.
                Type: string
            vum.os.username:
                Administrator username for the source VUM Windows operating
                system.
                Type: string
            vum.os.password:
                Administrator user password for the source VUM Windows operating
                system. If left blank, or omitted, you will be prompted to enter
                it at the command console during template verification.
                Type: string
            export.dir:
                Directory to export source configuration and data.
                Type: string