CHANGES update
Calculate one instance usage per transaction.

This prevent increasing the memory usage due to huge workflow history.
some whitespace/indent changes to please pep8
Prevent calling instance bang too often when not needed.
make pep8 happy
Use set_up_once_called conflicts with setUpOnce call

  setUpOnce is executed on save but afterSetUp is not.

  bootstrapSite should be invoked once per Test Case run instead a single
  time on save phase.
removed bogus __getinitargs__()
Merge branch 'cliff'
Fix duplicated definition of IExtrator

This enables the right acl_user, instead only shadow one.
Included recently added slapos_access_token_extration plugin
A new module has been installed.
Instance bang now returns "OK"
Return response object.
Missing base category on portal type.
Open Order line start/stop date have the same timezone.
Include more tests for check configuration and promises on a configured site.
Only prevent successive direct bang calls.
Re-enable the alarm disabled by mistake.
Do not allow to rename from the web site.

It seems it confuses newcomers for now.
Don't print partition informations if skipping processing this partition.