[ARROW-6741] [Release] Update changelog.py to use APACHE_ prefixed JIRA_USERNAME and JIRA_PASSWORD environment variables

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.16.0
• Component/s: Developer Tools
• External issue URL: https://github.com/apache/arrow/issues/16908
• Assignee: Wes McKinney
• Reporter: Krisztian Szucs
• Created: 30/Sep/19 14:24
• Updated: 11/Jan/23 07:49
• Resolved: 06/Oct/19 20:41

Description

Merge script has recently changed to use APACHE_JIRA_USERNAME and APACHE_JIRA_PASSWORD, changelog.py should use the same environment variables.

Also we could use crossbow.py changelog command which implements
the same functionality.