Transient timeouts are untestable when `WP_INSTALLING` is defined and set to ANY value. Transient timeouts cannot be tested during multisite runs because `wpmu_create_blog()` sets `WP_INSTALLING`. I have zero idea how these tests ever passed.

See #28706.


git-svn-id: https://develop.svn.wordpress.org/trunk@28965 602fd350-edb4-49c9-b593-d223f7449a82
Merge branch 'master' of git://develop.git.wordpress.org