fix(*): bump etcd ttl to 20 seconds

The component's boot relies on etcdctl for publishing keys to etcd.
Bumping to 20 seconds should prevent users from having their TTLs
expire due to etcd latency issues.

Author: Matthew Fisher

bin/boot

@@ -13,7 +13,7 @@ set -eo pipefail
 export ETCD_PORT=${ETCD_PORT:-4001}
 export ETCD="$HOST:$ETCD_PORT"
 export ETCD_PATH=${ETCD_PATH:-/deis/controller}
-export ETCD_TTL=${ETCD_TTL:-10}
+export ETCD_TTL=${ETCD_TTL:-20}
 
 # wait for etcd to be available
 until etcdctl --no-sync -C $ETCD ls >/dev/null 2>&1; do