Add  create and delete to Jumpgate volume API

    1. Support SL portable storage create operation via jumpdate
    2. Support SL portable storage delete operation via jumpdate
    3. Add unittest coverage for jumpgate volume create/delete

Change-Id: I9cd6acb0832279fdfa5080e728ecaef9ac9de638
@jimlindeman 

Concurrent create will not be a problem since the polling is based on the order id which is unique for each volume order. 
The isActive == 1 part is in _find_product_package_id which is to look up the portable
storage package id, which will be used for the order. That is also the search you are talking
about. For the volume order, we always poll it by order id.