Change 0.2.7 jenkins builders to use maint-0.2.7-redux, release-0.2.7-redux
For reasons discussed in #20512 (moved), the maint-0.2.7 branch is not where future 0.2.7 releases will come from. Instead of maint-0.2.7, please see maint-0.2.7-redux. Instead of release-0.2.7, please see release-0.2.7-redux.