Integrated Fujitsu ETERNUS DX (fate#317486)

In order to get Fujitsu ETERNUS DX volume types working a have
integrated the configuration for it to reflect the patch included into
our SUSE packages.

This fixes the request https://fate.suse.com/317486
Minor cleanup
Fix crash because of reference to resource not existing yet
Fix crash in cinder.conf template
Support for VMWare integration
Merge pull request #202 from vuntz/fujitsu-eternus

Integrated Fujitsu ETERNUS DX & VMware
Synchronize cinder.conf template with Icehouse

There's no functional change yet.

Note that some new options for NetApp were not added yet (so are still
in the diff) because we need to figure out if we care about them. These
are:
  netapp_webservice_path
  netapp_controller_ips
  netapp_sa_password
  netapp_storage_pools
  netapp_copyoffload_tool_path
Merge pull request #195 from vuntz/icehouse-conf

Synchronize cinder.conf template with Icehouse
Rework strings for Eternus backend

Use SMI-S instead of SMIS in strings, and do not repeat ETERNUS
everywhere as it's visible in the UI that this is for this backend.
Reorder list of backends in UI

Put raw devices first, then sort drivers alphabetically, and then put
local file, and finally manual driver. This feels a bit less random.
Do not create NFS-related files for NetApp when iSCSI is used
Revert "webui: Add useless backend header in single-backend mode"

This reverts commit fbfb2e840b1ed34cf133a879763d2099a5fa511e.
webui: Avoid useless backend header in single-backend mode

This time, with a clean implementation.
Merge pull request #203 from vuntz/netapp-no-nfs

Do not create NFS-related files for NetApp when iSCSI is used
Merge pull request #205 from vuntz/ui-bits

Fix SMI-S string and tweak order in backend menu