Increase error message specificity for name reuse
Increase error message specificity for name reuse

If `helm upgrade` fails because a reused name is still in use, the error
message does not specify which name is still in use. Update the error
message.

fibonacci1729/helm,jascott1/helm,appscode/helm,fibonacci1729/helm,technosophos/deployment-manager,appscode/helm,technosophos/k8s-helm,jascott1/helm,technosophos/deployment-manager,SlickNik/helm,technosophos/deployment-manager,technosophos/k8s-helm,technosophos/deployment-manager,SlickNik/helm,technosophos/deployment-manager