This allow during a subscription process, create a user and them create all
documents using that user w/o rely on proxy roles (keeping good ownership
across the documents).

Before this change, expression_instance would not be set when expression is
modified, leading to either non-applied filter expression (when no
expression_instance existed) or use of an outdated expression.
Use a volatile attribute to store the expression: it does not change the
amount of work needed to load the Expression instance (pickle is the raw
python expression as text) and it remove data duplication in exported
documents.

1. accept a list of converison server
2. retry in case of network error

Most properties of test suite and test suite repository were by mistake set with type "lines" instead
of strings. Due to this, constraints where not working (for checking missing properties). Also, workflow
was not properly set to check constraints. So at the end, most constraints were ignored.

Change properties from type lines to type string. Add test for constraitns. Add compatiblity code
to do transparent migration of existing tests suites and test suite repositories.

Remove obsolete properties and constraints.

/reviewed-on nexedi/erp5!671

/reviewed-on nexedi/erp5!705

/reviewed-on nexedi/erp5!633

This makes exponentially faster, if you have way too many security uids.

This makes exponentially faster, if you have way too many security uids.

When a script with manager proxy role is called from anonymous context, it include a HUGE list of security_uids, use unrestrictedSearchResults skips the unecessary usage of security_uids on catalog.

When a script with manager proxy role is called from anonymous context, it include a HUGE list of security_uids, use unrestrictedSearchResults skips the unecessary usage of security_uids on catalog.

   Changes on ERP5Security: Define getFacebookUserEntry to reduce code duplication
   Add facebook support for login and logout (optional) on erp5_core, xhtml and credentials.

Since the change for use of User ID this code should return reference and portal type of the ERP5 Login object.

  The implementation of external_login expects the reference of an Login object and the portal type of itself

Include draft of facebook Oauth code.

  This method and call is duplicated on several places

  The user can be present from diferent logins, password tool only works with ERP5LoginUserMager
  users.

Mixed commit:

  43b1ae1b
  2f05fe1b

Returning true allows to add movements to existing one, and this group shall
always separate them.

uid is used internally during recursive calls and using uid can lead to
traverse all lines of catalog.

Note: Generic code shall have no constraints at all.

Conflicts:

	bt5/erp5_accounting/bt/revision

It will protect against storing truncated data.

If 2 lines have the same effective date (catalog has a 1 second precision),
always return the validate and open first.

Commit: 02d06501

Changes applied from history:

http://git.erp5.org/gitweb/erp5.git/history/refs/heads/interaction-drop:/product/ERP5/Document/SubscriptionItem.py?js=1

Original commit from : Lukasz Nowak <luke@nexedi.com>
                       3e45ec35