Add XPOG coordinators to the analysis category, remove the xpog category with no package assigned

[fabiocos]

For the management of the AN release: use the standard analysis category, remove the xpog category with no package assigned.

[cmsbuild]

A new Pull Request was created by @fabiocos (Fabio Cossutti) for branch master.

@cmsbuild, @smuzaffar, @gudrutis, @mrodozov can you please review it and eventually sign? Thanks.
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