Make NetApp driver Mode configurable in UI

Add Options for configuring the NetApp direct
driver mode (either NFS or iSCSI). Hide the
OnCommand related options from the UI.
Merge pull request #58 from dirkmueller/netapp_fixes

https://github.com/crowbar/barclamp-cinder/pull/58

Merged by devtool for cloudsleuth
Allow crowbar-status/failed in barclamp databag

This makes it proposal schema version 2 compatible.
Merge pull request #63 from dirkmueller/fix_proposal_apply

Fix proposal apply