Log vm-cid when creating/attaching disks
Log vm-cid when creating/attaching disks

[#158400096](https://www.pivotaltracker.com/story/show/158400096)

cloudfoundry-incubator/bosh-vsphere-cpi-release,cloudfoundry-incubator/bosh-vsphere-cpi-release,cloudfoundry-incubator/bosh-vsphere-cpi-release,cloudfoundry-incubator/bosh-vsphere-cpi-release,cloudfoundry-incubator/bosh-vsphere-cpi-release