fix(tiller): don't update purged releases
fix(tiller): don't update purged releases

fixes #1807

adamreese/helm,jascott1/helm,yan234280533/helm,flynnduism/helm,flynnduism/helm,sushilkm/helm,rbwsam/helm,helm/helm,bacongobbler/helm,qwangrepos/helm,technosophos/k8s-helm,technosophos/k8s-helm,qwangrepos/helm,eicnix/helm,michelleN/deployment-manager,FengyunPan/helm,michelleN/deployment-manager,michelleN/deployment-manager,bacongobbler/helm,FengyunPan/helm,technosophos/deployment-manager,SlickNik/helm,technosophos/deployment-manager,bradj/helm,rbwsam/helm,technosophos/deployment-manager,bradj/helm,appscode/helm,adamreese/deployment-manager,SlickNik/helm,adamreese/deployment-manager,technosophos/deployment-manager,kdada/helm,adamreese/deployment-manager,thomastaylor312/helm,fibonacci1729/helm,fibonacci1729/helm,helm/helm,yan234280533/helm,adamreese/deployment-manager,iamzhout/helm,appscode/helm,eicnix/helm,thomastaylor312/helm,kdada/helm,adamreese/helm,jascott1/helm,michelleN/deployment-manager,technosophos/deployment-manager,adamreese/deployment-manager,iamzhout/helm,sushilkm/helm