Adding options to set can_set_mount_point

kvm doesn't support specifiying the mount point when adding a volume
so disabling this in the dashboard reduces confusion
Merge pull request #58 from derekhiggins/set-can_set_mount_point

Adding options to set can_set_mount_point
add gitreview

Change-Id: I6aff8ac217f4b20ab30d1fbff402794091c6c29b
Merge branch 'dev' of https://github.com/gwdg/puppetlabs-horizon into dev