Contributor permissions

[Iryna Kharaborkina]

|Hi, my name is Iryna. I am interested in contributing to the Apache 
Beam SDK (I think I could start with |||some |porting test subtasks in 
||BEAM-3650 <https://jira.apache.org/jira/browse/BEAM-3650>). I'd like 
to be added ||as a Jira contributor so that I can assign issues to 
myself. My ASF Jira Username is khiryna.|

|Thanks!/
/|