message: Apply correct pf4 button styling and fix disabled functionality.
diff: import * as React from 'react';
  import { Link } from 'react-router-dom';
  -import { ActionGroup, Button, Switch } from '@patternfly/react-core';
  +import { ActionGroup, Button, ButtonVariant, Switch } from '@patternfly/react-core';
  import { ButtonBar, history, resourcePathFromModel } from '@console/internal/components/utils';
  import { getActiveNamespace } from '@console/internal/actions/ui';
  import { SecretModel } from '@console/internal/models';
  @@ -181,14 +181,14 @@ const AddHost: React.FC = () => {
  <ActionGroup className="pf-c-form">
  <Button
  type="submit"
  - disabled={
  + isDisabled={
  !formValue.name ||
  !formValue.managementAddress ||
  !formValue.username ||
  !formValue.password
  }
  - className="btn btn-primary"
  id="save-changes"
  + variant={ButtonVariant.primary}
  >
  Create
  </Button>
  