Change Mock services to return their inputted values
This PR changes the Mock services (Product, Order Header and Order Line in particular) to return more useful responses. They will now return a string representation of themselves, with all of the data that has been assigned to them. The purpose of doing this is to allow us to enable Mock CBS services in Magento and have it return what we are actually sending CBS. This should hopefully allow us to debug CBS issues more easily.
Please review, if you can grok the mess of diffs: @weizhong-wang @lloyd-carter @KJOYNER