1. create "OAuth 2.0 Client" called "TestOAuth2Agent"
2. configure OAuth2
3. run the following grant_type=password command. it will return error
4. restart OpenAM server
5. run the same command in step 3. it will succeed
OAuth2 clients are agent account and OpenAM stores configuration in non-case sensitive way since LDAP is case insensitive. Therefore, RefreshTokenServerResource shouldn't check clientID in case sensitive way.