[transaction] explicit Transaction cnxset attribute
The Transaction object have a lot more attribute that those previously declared
in __init__. They are just dynamically assigned in Session code.
This changeset explicit the ``cnxset`` and ``mode`` attribute declaration.
sync_schema_props_perms('EmailAddress')
for source in rql('CWSource X WHERE X type "ldapuser"').entities():
config = source.dictconfig
host = config.pop('host', u'ldap')
protocol = config.pop('protocol', u'ldap')
source.cw_set(url=u'%s://%s' % (protocol, host))
source.update_config(skip_unknown=True, **config)
commit()