Merge pull request #15 from smidlr/custom/folsom

LVM Thin volumes support added to nova-volume and volume error-deleting problem solved
BUGFIX: PCI-1802 - volumes in error_deleting state when created from inaccessible NetApp snapshot
Merge pull request #16 from smidlr/rsm-PCI-1802

BUGFIX: PCI-1802 - volumes in error_deleting state
BUGFIX: PCI-1958 - zero out only first 1G during delete
Merge pull request #17 from zarnovican-gd/custom/folsom

BUGFIX: PCI-1958 - zero out only first 1G during delete