Update cinder to stable/icehouse

4f8ce80 Merge "Set volume_driver for iscsi backend explicitly" into stable/icehouse
75168b2 Set volume_driver for iscsi backend explicitly
47f40a1 Add extended logging options.
b59444f v2 endpoints: internal & admin protocols support
Merge pull request #124 from jistr/icehouse_cinder

Update cinder to stable/icehouse