Use the correct task instance in cdbq cleanup, initialization and
dequeue tasks to avoid cdbq being deleted when dequeue task is
running

Closes-Bug: #1349731
Change-Id: Ia31ba91f46d3b48c697ccf4c937516ac1642b968
Merge "Use the correct task instance in cdbq cleanup, initialization and dequeue tasks to avoid cdbq being deleted when dequeue task is running"