VMware: bug fix for instance deletion with attached volume

The creation of the connection information required by Cinder to
delete the volume accessed a resource that did not exist (as it had
been deleted). This would result in the instance being in a 'DELETING'
state and the Cinder volume in 'in-use' state.

Fixes bug 1223074

Change-Id: I5283b1ddea76c0eaaf7315fc8cf8969c6cd6755f
Merge "VMware: bug fix for instance deletion with attached volume"