Update SolidFire Volume driver

Adds support for clone volumes and set QoS use volume type / extra_specs.
Also includes some minor cleanup and some hardening for known pre-release
XDB issue in SolidFire Cluster API.

Change-Id: I4b39b301b9a1f9b859a694decfee48c74d22a74a
Enhance wsgi to listen on ipv6 address

Check if the hostname is ipv6 and set the family appropriately.
Picking up the snippet from glance.
Picked up some code from nova as well to get the test case running
properly

Change-Id: Ic79fcda2371f0907d75a142ea18b26b3e8d92e51
Support for SSL in wsgi.Server

SSL are entirely optional. Support for SSL as well using code from glance. We
have some new options for configuring the SSL support. There are tests for
accessing a sample app w/o ipv6 or ssl, one with just ssl and one with
ipv6 and ssl

DocImpact

Change-Id: I9aa1db6c9563868bf68ced7c4311daa870216ced
Merge "Enhance wsgi to listen on ipv6 address"
Merge "Support for SSL in wsgi.Server"
Merge "Update SolidFire Volume driver"