Fixed incorrect attribute mapping and removed item "long" description
The CBS endpoint does not have anywhere to "put" an item "long description" at this point. @alundholm had used P_MANUFACTURER_NAME for the item's name, and P_ITEM_DESCRIPTION for the item's description. Instead, the item's name should be in P_ITEM_DESCRIPTION. I created ECOM-253 to reflect the lack of support for long item description.
The integration test still fails because the SOAP endpoint is auto-generating an item number instead of using the one provided. Created bug ECOM-254 to capture that bug.
Introduced a ProductInputParametersMapper class which maps a Product to an InputParameters instance. Used empty strings for unsupported fields instead of null, which the endpoint expects.
Applied general code quality improvements and PSR-2 formatting updates.