message: handle issue while fetching labels for revisions
diff: import * as React from 'react';
  import * as cx from 'classnames';
  +import * as _ from 'lodash';
  import { TableRow, TableData } from '@console/internal/components/factory';
  import { Kebab, ResourceLink, ResourceKebab, Timestamp } from '@console/internal/components/utils';
  import { referenceForModel } from '@console/internal/module/k8s';
  @@ -22,6 +23,7 @@ const RevisionRow: React.FC<RevisionRowProps> = ({ obj, index, key, style }) =>
  const readyCondition = obj.status
  ? getCondition(obj.status.conditions, ConditionTypes.Ready)
  : null;
  + const service = _.get(obj.metadata, `labels["serving.knative.dev/service"]`);
  return (
  <TableRow id={obj.metadata.uid} index={index} trKey={key} style={style}>
  <TableData className={tableColumnClasses[0]}>
  @@ -36,12 +38,14 @@ const RevisionRow: React.FC<RevisionRowProps> = ({ obj, index, key, style }) =>
  <ResourceLink kind="Namespace" name={obj.metadata.namespace} />
  </TableData>
  <TableData className={cx(tableColumnClasses[2], 'co-break-word')}>
  + {service && (
  <ResourceLink
  kind={serviceReference}
  - name={obj.metadata.labels['serving.knative.dev/service']}
  + name={service}
  namespace={obj.metadata.namespace}
  - title={obj.metadata.labels['serving.knative.dev/service']}
  + title={service}
  />
  + )}
  </TableData>
  <TableData className={tableColumnClasses[3]}>
  <Timestamp timestamp={obj.metadata.creationTimestamp} />
  