Xiaoguang(William) Zhang 09fccd6b71 Update alertmanager image to v0.20.0
Update alertmanager image from v0.11.0 to v0.20.0

Change-Id: I0ba14d1001a53964ebc28bc9ea9be999402d54fb
2020-07-09 14:24:28 -04:00
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2020-07-09 14:24:28 -04:00
2020-05-07 02:11:15 +00:00