This new Role is defined only on portal_components and users can be only added
to this Role through editing zope.conf. Also, add a Permission for reset as
this role is not available outside of portal_components and is still useful
for Workflows for example.

Also, Rename *MigrateAllComponentFromFilesystem to *MigrateSourceCodeFromFilesystem.

This avoids having two interaction workflow for resetting dynamic classes and modules.

Instead, use savepoint which avoids triggering interaction workflows.

Also, set _archive properly for ZODB Document and Extension.

Add missing version in Component document_id for testBusinessTemplate (087ef32b908c9b384f5769fa2375c3202eff2ed5).

This reverts commit deb7e37e7690d50a6dc1e9aab05f4a7099973287 which introduced
a regression (test_BusinessTemplateWithDocumentPropertySheetMigrated failed).

Conflicts:

	product/ERP5/Document/BusinessTemplate.py

These tests also check whether recordable properties are properly set and cleared.

Checking the validation state is not enough as the validated value (save
through RecordablePropertyMixin) should never be overriden even when a
Component in modified state is saved and still contain errors.

This allows to check consistency of reference and version as well (through
PropertyRecordableMixin rather than fiddling with the workflow history). Also,
split up state and error message into two separate fields.

Errors may occur if in the same transaction a Component is created and
another one depending upon the former...

Instead, reset it everytime because after all, contentValues() is
rather fast even with 1000 objects.

Add Business Template action to import Document and Extensions automatically after giving the version.

Migration is now performed at Business Template level as it makes more
sense rather than on Component Tool which would require specifying the
target Business Template to update Document Template Item and
Extension Template Item.

An appropriate Python package is created in erp5.component.document.
erp5.component.document.COMPONENT_REFERENCE is just an alias for
erp5.component.document.VERSION.COMPONENT_REFERENCE where VERSION is the
version with the highest priority (as defined by priority property on
ComponentTool) where the component is available.

When versions will be introduced, there will be an import action which will
take the required version. Moreover, there are not so many Extensions and
Documents to migrate after all and Products will have to be migrated manually
as well.

Simplify import hooks by assuming that find_module() filters everything before load_module() is called.