Move create_volume flow to a subfolder

In order to start splitting up the create_volume flow into
smaller files we will start by moving the create_volume.py
file to a folder with just __init__.py and this will then
act as the base for create_volume task modules.

Also add in a utils file that contains to start the commonly
used debug listener attachment mechanism.

Change-Id: Ie2fd0c77bb04f8153afecdce75588614b48fed8a
Merge "Move create_volume flow to a subfolder"