tree e7fe0ed100d291d6acb2e47e064aacd5829c13be
parent 27152e34302cc69c75b088f9dcbeb53036e7e2e2
author LiZekun <2954674728@qq.com> 1654398293 +0800
committer LiZekun <2954674728@qq.com> 1662429478 +0000

Use TOX_CONSTRAINTS_FILE

UPPER_CONSTRAINTS_FILE is old name and deprecated
This allows to use upper-constraints file as more
readable way instead of UPPER_CONSTRAINTS_FILE=<lower-constraints file>.

Change-Id: I58f9ad960a45d6d52852353c0fc9682cecd5f4f4