fix unit tests by not using the new create_eid implementation with sqlite
Actually, fix a couple of issues with a previous attempt:
* do not use double underscores as method patching will fail with these
* old method must always be used with sqlite regardless of the no_sqlite_wrap attribute
add_relation_type('prefered_form')
rql('SET X prefered_form Y WHERE Y canonical TRUE, X identical_to Y')
commit()
drop_attribute('EmailAddress', 'canonical')
drop_relation_definition('EmailAddress', 'identical_to', 'EmailAddress')
if 'see_also' in schema:
sync_schema_props_perms('see_also', syncprops=False, syncrdefs=False)