user-login display depends on credential preference if it exits
fields are now required
do not assume the field will always be display on the tool

also fix check of email content in subscription message

script execution

This prevents we have unfinished tests

also cast delivery_ratio to float for safety.

During usage of shacache and shadir it was possible to publish document
immediately.

If there is problem with such scenario, it shall be fixed in correct place with
a test proving issue.

Fix the issue that the Stock tab in Production Order or Production Packing List returns all the inventories when the Deliveries do not have a resource.

As there is not default ERP5 extraction plugin, new plugins shall fallback
to default way of ERP5 extraction mechanism: DumbHTTPExtractor from PAS.

Some tests contains non-ascii char, which causes problems when print
the report with logMessage.

ERP5 Certificate Authority is simple tool to manage SSL certificates related
with various documents.

By default it provides user interface for Person getting and revocation of
certificates.

It comes from Vifib project code.

Only pure PAS plugin parts are implemented.

By understanding external_login in ERP5UserManager it is not required to repeat
authenticateCredentials logic.

Thanks to this ERP5ExternalAuthenticationPlugin can be used only as credential
extraction plugin.

Extend test suite to prove that enabling ERP5ExternalAuthenticationPlugin does
not impact default scenario.