[7.4] [DOCS] Reformat clear cache API docs (#46512)#47663

Merged

jrodewig merged 1 commit intoelastic:7.4from jrodewig:backport.7.4.pr-46512

Oct 7, 2019

+121-36

Commits on Oct 7, 2019

[DOCS] Reformat clear cache API docs (#46512 )
jrodewig
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