message: use tokenServiceId from JHipster properties instead of hard coded string literal
  fix
diff: @@ -63,7 +63,8 @@ public class OAuth2ClientCredentialsService {
  map.add("grant_type", "client_credentials");
  HttpEntity<?> requestEntity = new HttpEntity<>(map, headers);
  - ResponseEntity<DefaultOAuth2AccessToken> responseEntity = this.restTemplate.exchange("http://UAA/oauth/token", HttpMethod.POST, requestEntity, DefaultOAuth2AccessToken.class);
  + String uaaServiceId = jHipsterProperties.getSecurity().getClientAuthorization().getTokenServiceId();
  + ResponseEntity<DefaultOAuth2AccessToken> responseEntity = this.restTemplate.exchange("http://" + uaaServiceId + "/oauth/token", HttpMethod.POST, requestEntity, DefaultOAuth2AccessToken.class);
  if (!responseEntity.getStatusCode().is2xxSuccessful()) {
  //TODO
  