[Monitoring] Ensure the settings api always return the xpack/default_admin_email#22220

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chrisronline merged 4 commits intoelastic:masterfrom

chrisronline:monitoring/fix/22107

Aug 23, 2018

Commits on Aug 21, 2018

If the settings collector returns nothing, ensure the settings api still returns a null value for default_admin_email
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Update test
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Commits on Aug 22, 2018