Enable *ALL for getProducts

[nelsoncj-ibm]

API doesn't accept *ALL as a valid option, use blanks instead.

[ThePrez]

Documenting for posterity, from the qszsltpr API doc for when *LIST is specified:

If the Product ID, Product option, and Release level are all blank, all available products 
at all release levels are displayed or returned.

Product ID. The product IDs to display or return. The product ID must be a valid product 
ID for a defined product or blank. If the API does not find a valid product ID from the 
defined products, an error is returned.

Product option. The product option to display or return. The product option must be 
blank or a valid product option must be specified. Valid values are *BASE (00000), 00001, 
00002, 00003, and so on. Leading zeros are required.

Release level. The version, release, and modification level of the product.