Provide a helper that checks if the user is admin for an action

[openlowcode]

An user is considered an admin for an action if he is either an admin of the module the action belongs to, or an admin of the site ( Sovereign ). A new method in the SecurityBuffer should provide a confirmation if the user is admin or not for the action.

This can be used for differentiated business logic where an admin user is not subject to controls.

Enabler for #70

[openlowcode]

Finally developed it as part of OLcServer (OLcServer.isCurrentUserAdmin(ActionExecution action)

[openlowcode]

Also, I did another correction, entry is the SModule itself, not the action, it allows to get the module from various contexts (DataObject, Action...)