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