Improve phpspec to make them more compliant #128

*replace all Agrument::Any() by Argument::any()
*remove instanciation of MagentoSoapClientParameters and mocked it
Improve phpspec to make them more compliant #128

*Removed instances of MagentoSoapClientParameters and mocked it
Merge pull request #129 from akeneo/enhancement/improvephpspecs

Enhancement/improvephpspecs