[Erp5-dev] CMFActivity revised

[Yoshinori Okuji]

I've added some new functions into CMFActivity. I've modified ZSQLCatalog and
ERP5Catalog as well. Due to these changes, you need to recreate the message
table of CMFActivity, and update catalog methods.

Most unit tests succeed, including the one in CMFActivity, but some tests
still fail, such as two test methods in testOrder. This might be related to
the handling of after_method_id, but I'm not sure. I will look at them more
later.

YO