Allow CDATA in the description supplied by the .sopm file

[bschmalhofer]

In a .sopm file I wrote something like:

    <Description Lang="en"><![CDATA[
        Supply the new console command Maint::Ticket::Beautify.
        This command beautifies.
    ]]></Description>

CodePolicy complained about this, stating:

[checked] TicketBeautify.sopm
TidyAll::Plugin::OTOBO::SOPM::RequiredElements
You have forgot to use the element <Description Lang="en">!
[checked] Kernel/System/Console/Command/Maint/Ticket/Beautify.pm

I see no obvious reason why using CDATA should not be allowed there. CodePolicy should accept this.