title: OAuth2RestTemplate authetication issue getting access_denied
body: <p>By using the following curl command i am able to access token and getting following response
  curl username:password@machinename:11002/appName/oauth/token -d grant_type=password -d username=loginFormUserID  -d password=loginFormUserPassword</p>
  
  <p>Response: {
     "entity_id" : 9,
     "entity_type" : "",
     "refresh_token" : "eyJhbGciOiJSUzI1NiJ9.",
     "scope" : "login",
     "expires_in" : 3599,
     "entity_name" : "name",
     "access_token" : "eyJhbGciOiJSUzI1NiJ9.ey",
     "token_type" : "bearer"
  }</p>
  
  <p>if i will use spring OAuth2RestTemplate i am getting access denied,Here is my code details</p>
  
  <pre><code>    ResourceOwnerPasswordAccessTokenProvider provider = new ResourceOwnerPasswordAccessTokenProvider();
      ResourceOwnerPasswordResourceDetails resource = new ResourceOwnerPasswordResourceDetails();
      resource.setClientAuthenticationScheme(AuthenticationScheme.form);
      resource.setAccessTokenUri("http://machinename:11002/appName/oauth/token");
      resource.setClientId("loginFormUserID");
      resource.setClientSecret("loginFormUserPassword");
      resource.setGrantType("password");
      resource.setUsername("username");
      resource.setPassword("password");
      OAuth2AccessToken accessToken = provider.obtainAccessToken(resource, new DefaultAccessTokenRequest());
      OAuth2RestTemplate restTemplateQ     = new OAuth2RestTemplate(resource, new DefaultOAuth2ClientContext(accessToken));
      System.out.println( restTemplateQ.getAccessToken());
  </code></pre>
  
  <p>Exception in thread "main" error="access_denied", error_description="Error requesting access token."
      at org.springframework.security.oauth2.client.token.OAuth2AccessTokenSupport.retrieveToken(OAuth2AccessTokenSupport.java:145)
      at org.springframework.security.oauth2.client.token.grant.password.ResourceOwnerPasswordAccessTokenProvider.obtainAccessToken(ResourceOwnerPasswordAccessTokenProvider.java:47)
      at com.copart.g1.seller.middleware.client.RestTemplateTest.main(RestTemplateTest.java:55)
  Caused by: org.springframework.web.client.HttpClientErrorException: 401 Unauthorized
      at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:91)
      at org.springframework.security.oauth2.client.token.OAuth2AccessTokenSupport$AccessTokenErrorHandler.handleError(OAuth2AccessTokenSupport.java:244)
      at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:641)
      at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:597)
      at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:565)
      at org.springframework.security.oauth2.client.token.OAuth2AccessTokenSupport.retrieveToken(OAuth2AccessTokenSupport.java:137)
      ... 2 more</p>