Add missing event content CommonEventContent to FEVTSIM.

[vadler]

Backport of #1216:
Add missing CommonEventContent to FEVTSIM and inherited FEVTDEBUG.

[cmsbuild]

A new Pull Request was created by @vadler (Volker Adler) for CMSSW_6_2_X.

Add missing event content CommonEventContent to FEVTSIM.

It involves the following packages:

Configuration/EventContent

@smuzaffar, @Dr15Jones, @ktf, @nclopezo can you please review it and eventually sign? Thanks.
@ghellwig this is something you requested to watch as well.
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@davidlt you are the release manager for this.

[Dr15Jones]

@vadler Does this make FEVTSIM better match FEVT?

[vadler]

@Dr15Jones : Yepp. it has been integrated in 53X and 70X already.

[ktf]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IBs unless changes or unless it breaks tests. @davidlt can you please take care of it?

[fabiocos]

+1