The release doc maker fails to generete release note

After a bit digging, I found that the problem is the field id map.

We load the field id map from this url:

https://issues.apache.org/jira/rest/api/2/field

Now it will return duplicated entries for the same field. For 'Release Note', it has two entries:

Release Note => customfield_12310192
Release Note => customfield_12314133

We will load the second one as it comes last and will overwrite the first one, but at least for HBase, what we have for an issue is the first one, this will lead to an empty release note.