Add hook-delete-policy ReleaseServer unit tests
Add hook-delete-policy ReleaseServer unit tests

Cover hook-succeeded, hook-failed and before-hook-creation hook delete policies.

fibonacci1729/helm,michelleN/deployment-manager,appscode/helm,bacongobbler/helm,adamreese/deployment-manager,helm/helm,technosophos/deployment-manager,technosophos/k8s-helm,eicnix/helm,helm/helm,technosophos/deployment-manager,technosophos/deployment-manager,bacongobbler/helm,fibonacci1729/helm,SlickNik/helm,michelleN/deployment-manager,adamreese/deployment-manager,adamreese/deployment-manager,michelleN/deployment-manager,adamreese/helm,eicnix/helm,adamreese/deployment-manager,technosophos/deployment-manager,adamreese/helm,technosophos/k8s-helm,appscode/helm,michelleN/deployment-manager,adamreese/deployment-manager,SlickNik/helm,jascott1/helm,jascott1/helm,technosophos/deployment-manager