update besimple soap

Bug fix: [yes]
Feature addition: [no]
Backwards compatibility break: [no]
Unit test passes: [yes]
Behat scenarios passes: [yes]
Checkstyle issues: [no]*
Documentation PR: [link to the documentation PR if there is one]
Fixes the following issues:
 - https://github.com/akeneo/pim-community-standard/issues/2