Set vol driver initialized before deleting volumes

Move the call to set_initialized before calling delete_volume in
init_host.  The delete_volume method has a precondition that the
driver be initialized.

Closes-Bug: #1232177

Change-Id: Ie73bd30e0ab80d489ab61ba8a60fac51ccb505b5
Add XML response tests for qos specs manage ext

Make sure XML serializing is working for qos spec index and show, as
well as association show.

Change-Id: If678cf9201c3ba218a485999e11fc034a06495d4
Merge "Set vol driver initialized before deleting volumes"
Merge "Add XML response tests for qos specs manage ext"