Merge pull request #631 from PureStorage-OpenConnect/fix-metro-etcd

Update etcd

Author: andrewh1978

scripts/etcd

@@ -1,7 +1,8 @@
 # Run an etcd container
 mkdir /etcd
+# :latest tag is currently missing on quay, setting version
 docker run -d --restart unless-stopped -v /etcd:/etcd -p 2382:2382 \
- --name etcd quay.io/coreos/etcd:latest \
+ --name etcd quay.io/coreos/etcd:v3.5.21 \
  /usr/local/bin/etcd \
  -name etcd0 -data-dir /etcd \
  -auto-compaction-retention=3 -quota-backend-bytes=8589934592 \