message: Use secretType enum instead of string
diff: @@ -206,14 +206,14 @@ class SourceSecretForm extends React.Component<SourceSecretFormProps, SourceSecr
  <label className="control-label" htmlFor="secret-type" >Authentication Type</label>
  <div>
  <select onChange={this.changeAuthenticationType} value={this.state.type} className="form-control" id="secret-type">
  - <option value="kubernetes.io/basic-auth">Basic Authentication</option>
  - <option value="kubernetes.io/ssh-auth">SSH Key</option>
  + <option value={SecretType.basicAuth}>Basic Authentication</option>
  + <option value={SecretType.sshAuth}>SSH Key</option>
  </select>
  </div>
  </div>
  : null
  }
  - { this.state.type === 'kubernetes.io/basic-auth'
  + { this.state.type === SecretType.basicAuth
  ? <BasicAuthSubform onChange={this.onDataChanged} stringData={this.state.stringData} />
  : <SSHAuthSubform onChange={this.onDataChanged} stringData={this.state.stringData} />
  }
  