Fix check for mount.nfs helper installation

This fixes the issue for checking the
existence of mount.nfs helper program
in installation directories during
driver set up.

Closes-Bug:#1212286

Change-Id: If2fa925614bd42295eae0f62ba948e14a89e1343
Fix NetApp iscsi drivers for cinder backup

It fixes the iscsi drivers to query backend
if a lun entry is not found in the cache. Due
to the c-bak feature spawning volume drivers
separately than c-vol it caused NetApp drivers
to error out if volume was created after starting
c-bak. This patch fixes it.

Change-Id: I3570e58560408d3f7117bb1068cf530ae05521b3
Closes-Bug:#1229620
Allow v2 Volume API to create volume with type name

v2 API only accepts volume type ID when creating volume, while v1
API allows both volume type name and ID (volume type name is unique
in Cinder). This patch enables v2 API to accept volume type name
as create() parameter. Aslo volume type validation code block
in v1 API create() is refactored to a slimmer version.

Change-Id: I4ee98b67a0a0e98ff4d402749e12b1335d45f64d
Close-bug: 1228835
Update rootwrap with code from oslo

These are all minor changes bringing cinder up to commit c03f247

c03f247 Skip hidden files while traversion rootwrap filters
3f4d1d5 Fix os.getlogin() problem with no tty
fc04531 Send rootwrap exit error message to stderr
3663010 rootwrap: improve Python 3 compatibility
28395d9 Fixes files with wrong bitmode

Change-Id: I3a37f23a2617a7c69bc4be422f3fdcab8833e498
Merge "Update rootwrap with code from oslo"
Merge "Allow v2 Volume API to create volume with type name"
Merge "Fix check for mount.nfs helper installation"
Merge "Fix NetApp iscsi drivers for cinder backup"