[Pacemaker] [pygui] Rewrite "instance_attributes", "operations" and "expression" based on the new model

[Gao Yan]

Hi,
It's really quiet here, huh? ;-)

I've improved the common model of GUI for dynamic filling and
description. And "instance_attributes", "operations" and "expression"
have been rewritten based on the model.
Additionally the metadata of RA has been exploited for adding
"instance_attributes" and  "operations" objects.

Changeset 11792:65350279a168

Any comment or test will be welcome.Thanks!

-- 
Yan Gao
China R&D Software Engineer
ygao at novell.com

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