Change environment variable name to one that may not be overridden by bash login scripts.
Imported from Git
Author: Tristan Juricek <tjuricek@perforce.com> 1421104593 -0800
Committer: Tristan Juricek <tjuricek@perforce.com> 1421104593 -0800
sha1: 475c8a28e0034fdba76a1dc32fdec262d8eb9d09
push-state: complete
parent-changes: fd910ea269fb5233d30da5100f63a622437c066f=[984292]