[7.x] [Task Manager] Correctly handle `running` tasks when calling RunNow and reduce flakiness in related tests (#73244)#74386

Merged

gmmorris merged 1 commit intoelastic:7.xfrom gmmorris:backport/7.x/pr-73244

Aug 5, 2020

+316-90

Commits on Aug 5, 2020

[Task Manager] Correctly handle running tasks when calling RunNow and reduce flakiness in related tests (elastic#73244 )
gmmorris
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