[UPDATE] php doc and WsdlToPhpGenerator updates

[UPDATE] php doc and WsdlToPhpGenerator updates

WsdlToPhpGenerator::manageWsdlNodeAttribute() is now well used. It means
it is used for attribute tags and attribut elements (part of a struct).
WsdlTophpGenerator::manageWsdlNodeElement() is now used for element tags
only and is empty for now.

WsdlTophpModel::cleanComment() displays unique values depending on its
last parameter value.

Minor php doc updates