[7.x] [SIEM][Detection Engine] Silence 409 errors on signal creation (#53859)#53903

Merged

rylnd merged 1 commit intoelastic:7.xfrom rylnd:backport/7.x/pr-53859

Jan 3, 2020

+71-31

Commits on Jan 2, 2020

[SIEM][Detection Engine] Silence 409 errors on signal creation (elastic#53859 )

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