LDAP Users do not display full name

[asmartin]

The LDAP attribute I use that contains a user's first and last name is displayName (e.g John Smith). I have configured the User Data Field Map field on the LDAP configuration page to contain the following:

{"displayName:"name", "mail":"email"}

However, all users still show up as their LDAP username in the list of Direct Messages, in chats, and when typing @-mentions. How can I get users real names to show up in RocketChat?

[marceloschmidt]

Somewhat related to #1325

[marceloschmidt]

Duplicate of #324