Allocate CAPI card context in one chunk
Allocate CAPI card context in one chunk

Previously we allocated the memory needed to implement our queue in
multiple buffers. This change allocates just one memory chunk where
all the information is inside: ddcb queue, semaphores, and other status
data needed to run the queue.

tblume/genwqe-user,tblume/genwqe-user,ferseiti/genwqe-user,ibm-genwqe/genwqe-user,ibm-genwqe/genwqe-user,ferseiti/genwqe-user,ibm-genwqe/genwqe-user