Fix various exception paths

Fixes bug 1130723

Some bugs were introduced in https://review.openstack.org/#/c/20514/
this patch fixes the discovered errors. It also removes volume_id
parameters from error messages.

Change-Id: I9ff75482fe2bc13dbb65e7d666035a13a19d5c98
Cinder devref doc cleanups

Way back when Cinder was inagurated as a separate project, the docs
directory from Nova was used as a seed for the one in the Cinder repo

This patch is simply cleaning out images and files which have no
relation to Cinder at all, and are at best extremely outdated when
applied to Nova.

Aside from the deletions which are mainly images, and files related
to the configuration of CloudPipe, there is one modification to
conf.py which simply removes a reference to a vmware doc that no
longer exists.

Change-Id: I2140035f98bd332f25d7dd7569993bcd960a869e
Fixed cinder-backup start errors seen with devstack

Changes:
- Added cinder-backup to scripts in setup.py
- Added service_name to backup manager __init__
- Switched backup manager to using oslo.config
- Modified cinder-backup to use ProcessLauncher

Fixes bug: 1131147

Change-Id: I9b02d64def4ee892e9cfde4b4bcd50e5f9f9b707
Merge "Fixed cinder-backup start errors seen with devstack"
Merge "Fix various exception paths"